Siqueira Castro – Advogados > Brasilia, Brazil > Firm Profile
Siqueira Castro – Advogados Offices
SCN Quadra 04, Pétala B
Ed. Centro Empresarial Varig, Grupo 1303
CEP: 70714-900 Brasília/DF
Brazil
- Go to...
- Rankings
- Firm Profile
- Main Contacts
- Lawyer Profiles
Siqueira Castro – Advogados > The Legal 500 Rankings
City focus - Fortaleza > Leading firms Tier 1
Siqueira Castro – Advogados‘ Fortaleza office offers support in non-contentious and contentious matters, such as civil actions and social contribution disputes, with a particular focus on the infrastructure, oil and gas, and energy segments. Rubens Emidio Costa Krischke Junior often represents construction, aviation, and consumer goods clients in civil, consumer and credit recovery claims. Talita Amaro is regularly engaged in tax proceedings at municipal, state, and federal level; she is a key contact for food and beverage, distribution, and construction companies seeking advice on matters concerning tax incentives, special regimes, and tax regularity certificates.Practice head(s):
Rubens Emidio Costa Krischke Junior; Talita Amaro
Key clients
Nacional Gás Butano
Esmaltec Eltrodomésticos
Associação dos Defensores Públicos do Estado do Ceará
Asfaltos Nordeste
Hidrotintas Indústria e Comércio de Tintas
Construtora Sá Cavalcante
Shopping Rio Poty
Cortez Engenharia
CTZ Eolic Tower
GD Energy Solutions
M Dias Branco
Ibitu Energia
Cabo Verde Airlines
State Grid
Magis Incorporações
Sumitomo Chemical Brasil Indústria Química
Ktek Soluções de Engenharia Eireli
ArcelorMittal Pecém
Work highlights
- Sponsoring the interests of the Associação dos Defensores Públicos do Estrado do Ceará throughout the State of Ceará.
- Assisting Ibitu Energia with several projects in the northeastern states of Brazil.
- Advising M Dias Branco Alimentos on several federal administrative processes concerning the transfer of compensation of credits relating to undue payments.
City focus - Manaus > Leading firms Tier 2
Siqueira Castro – Advogados’ national reach makes it equipped to handle a variety of complex matters pertaining to labour, regulatory, and tax law. The firm represents clients from a range of industries, including but not limited to banking, energy, and construction. Cassio Chaves Cunha and Gustavo Gonçalves Gomes co-head the practice and bring a slew of expertise to the team – Cunha is adept in civil, banking, and contractual mandates, while Gomes specialises in litigation, consumer relations and environmental law. Another key name in the group is associate Claudia Krauskopf, who handles a mix of on civil, contractual, and environmental issues, alongside litigation and consumer relations matters.Practice head(s):
Cassio Chaves Cunha; Gustavo Gonçalves Gomes
Other key lawyers:
Testimonials
‘The firm stands out for the technical quality of lawyers, its national reach, and the direct involvement of partners.’
Key clients
Toyota do Brasil
Banco BMG
Banco Santander
HDL da Amazônia Indústria Eletrônica
Construções e Comércio Camargo Correa
Biotargeting Representações e Comércio de Produtos para Saúde
TIM
ESMALTEC
Work highlights
- Represents Banco BMG in lawsuits in Manaus.
- Advised Biotargeting on administrative, compliance, and regulatory matters.
- Representing Toyota do Brasil in several legal proceedings related to consumer law.
City focus - Brasilia > Litigation Tier 3
Siqueira Castro – Advogados’ dispute resolution practice is regarded for handling actions related to debt collections, white-collar crime, and contractual and shareholder disputes. The group’s growing client roster is made up of companies from a range of industry sectors, including agribusiness, banking, and technology. Marina Araujo Lopes heads the Brasília practice and focuses on business litigation before the higher courts; she is also recognised for her knowledge of civil, administrative, and regulatory law.Practice head(s):
Marina Araujo Lopes
Testimonials
‘The team stands out in the national legal market for a unique combination of attributes that solidify its position as one of the main law firms in Brazil. With a highly qualified team specialised in various areas of law, Siqueira Castro offers an excellent service, marked by personalised clientattention and the incessant search for innovative and effective solutions to the legal challenges faced by its clients.’
‘The group’s proven ability to achieve positive results in complex cases is a reflection of the deep technical knowledge and tireless dedication of its professionals.’
‘The firm is recognised for its ability to adapt to changes in the legal landscape and for adopting innovative practices and technologies to better meet client needs. These attributes, combined with the solid reputation and respect gained in the market, distinguish Siqueira Castro as a reliable and high-standard choice for those seeking legal services of exceptional quality.’
Key clients
Instituto Brasileiro de Petróleo e Gás
Indaiá Brasil Águas Minerais
Companhia Distribuidora de Gás do Rio de Janeiro
Federação das Empresas de Transporte de Passageiros do Estado do Rio de Janeiro
Fraport Brasil Aeroporto de Fortaleza
Fraport Brasil Aeroporto de Porto Alegre
Serra Do Facão
Vale
Amil Assistência Médica Internacional
Work highlights
- Representing Companhia Distribuidora de Gás do Rio de Janeiro in a civil action filed by the Federal Attorney’s Office seeking the sum of R$300m, correspondent to the amount of credit granted by the IRS in favour of the client in 2003 by a decision revoked in 2005 and the prohibition to contract with the public administration.
- Representing Federação das Empresas de Transporte de Passageiro do Estado do Rio de Janeiro in two representations of unconstitutionality.
City focus - Salvador > Leading firms Tier 3
Siqueira Castro – Advogados’ Salvador-based office – noted for its ‘high quality service, competence, and professionalism’ – has particular expertise in tax and labour matters, representing clients in compliance actions, labour claims, tax litigation, and debt disputes, among other issues. The group is instructed by clients from a variety of sectors, including construction, oil and gas, consumer products, and steel. Co-leading the team are tax law specialist Marluzi Andrea Costa Barros, who has extensive experience in fiscal judicial and administrative proceedings, and social security and labour law expert Fabiana Galdino.Practice head(s):
Fabiana Galdino; Marluzi Andrea Costa Barros
Other key lawyers:
Bruna Valéria Jatczak
Testimonials
‘The firm stands out for its high quality service, competence, and professionalism.’
‘The firm well-engaged professionals in important federative units in the North and Northeast. There are important regional legal topics in which lawyers are involved, bringing impactful solutions to businesses.’
Key clients
White Martins Gases Industriais
Paranapanema
Hydra Corona Sistemas de Aquecimento de Água
Brasturinvest Investimentos Turísticos
Kordsa Barsil
Cia. de Ferro Ligas da Bahia – FERBASA
Petróleo Brasileiro – PETROBRAS
CCR
Grupo Inbetta
Work highlights
- Assisting White Martins Gases Industriais with a compliance action resulting from the decision handed down by TST regarding a clause added to 1989’s Collective Convention, which guarantees workers an annual salary adjustment based on Consumer Price Index.
- Acting for Cia. de Ferros da Bahia – FERBASA in a state tax litigation claim that dates to a conflict involving the interpretation of the ICMS tax legislation regarding the reduction of the calculation base in energy purchase operations by industries.
Tax > Tax litigation Tier 3
Brazil > White-collar crime and investigations Tier 3
Handling both white-collar legal consultancy and corporate criminal litigation, Siqueira Castro – Advogados is adept at representing multinationals’ representatives, directors and employees in administrative and judicial procedures. The team is well placed to advise on crimes relating to the financial system, tax, corporate, public bids, and money laundering. Leading the team, João Daniel Rassi – ‘a highly prepared criminal lawyer with extensive experience‘ – is proficient in criminal proceedings pertaining to the environment, tax, antitrust and the capital markets. At senior associate level, Pedro Luis de Almeida Camargo is a key name for litigation and federal police operations, while Beatriz Massetto Trevisan shines in matters related to tax evasion, environmental crimes and fraud.Practice head(s):
João Daniel Rassi
Other key lawyers:
Testimonials
‘The Siqueira Castro team is always very dedicated to all deliveries they make, they meet deadlines, and provide feasible and personalised suggestions for the company’s segment. They are always assertive in their feedback, due to the fact that they have offices in practically every state in Brazil, which greatly facilitates service at a national level, as they know the culture and behaviour of the judiciary in each location.’
‘The partners’ competence, clarity and availability in criminal matters that often need to be dealt with urgently are a differentiator.’
‘João Daniel Rassi is a highly prepared criminal lawyer with extensive experience. Has the ability to maintain focus and objectivity even when the subject and the people involved are complex. Analyses and explains the pros and cons of one or another path that can be adopted, facilitating decision making.’
‘Committed team, with renowned legal knowledge and differentiated client service.’
‘The team has strong technical capacity to meet the demands presented in the best possible way.’
‘João Daniel Rassi, a reference partner in the criminal area, has the academic and practical knowledge necessary to meet demands of this nature.’
‘The firm has extensive technical knowledge, and is accustomed to the day-to-day operations of the Judiciary throughout the country. Furthermore, it is made up of respected lawyers in the legal world. It also has high rates of favourable decisions.’
‘João Daniel Rassi and Beatriz Massetto Trevisan are the lawyers who stand out. They have extensive technical knowledge, create great strategies and know the sector in which they operate.’
Key clients
Smartfit Escola de Ginástica e Dança S.A.
ECOLAB QUÍMICA LTDA.
Chr. Hansen
Fast Shop S.A
Grupo Edson Queiroz – Esmaltec
Temoinsa do Brasil LTDA
Pfizer Inc.
White Martins Gases Industriais S.A
Nissan do Brasil
Work highlights
- Assisted Nissan with a police inquiry into allegations of tax fraud by Nissan and its representatives.
- Assisted Ecolab with a police inquiry into allegations of crime against public health by Ecolab and its representatives, regarding the alleged contamination of a sanitising product.
- Represented White Martins before the Superior Court of Justice for charges pressed against it concerning sound and atmospheric pollution crimes.
Energy and natural resources > Electricity (and renewable energy) Tier 4
Beyond its traditional strengths in regulatory advice and administrative litigation before ANEEL, Siqueira Castro – Advogados has gained traction in assisting consumers gain access to the national grid. In collaboration with the firm’s corporate, finance, and real estate departments, the team is also proficient in transactions and the implementation of generation projects. Following the departure of former practice co-head Eduardo Rodrigues Evangelista in November 2023, Humberto Negrão flies the ship solo in São Paulo, focusing on the generation, transmission, trading and consumption segments. Associate Victor Navarro joined the team in May 2023 from Zeigler Advogados, bringing with him a combination of regulatory and litigation experience. Pedro Monti left the firm in July 2023.Practice head(s):
Humberto Negrão
Other key lawyers:
Testimonials
‘Agile and exclusive service, differentiated content and excellent technique/legal knowledge.’
Key clients
CEI – Companhia Energética Integrada
Central Fotovoltaica Irupé Participações
General Motors do Brasil
Gerdau
Albioma Participações do Brasil
Operador Nacional do Sistema – ONS
Work highlights
- Advised Gerdau on the regulations applicable to the right to access the National Basic Grid.
- Advised Albioma on the implementation of distributed generation projects, including issuing a legal opinion evaluating regulatory requirements, the viability and risks of projects.
- Advised CEI on an administrative process requesting the conversion of a concession into an authorisation.
Brazil > Environment Tier 4
Straddling the spheres of environmental, urban, and biodiversity law, Siqueira Castro – Advogados’ team of seasoned professionals is invested in the avoidance of environmental liability and litigation for clients in the mining, energy, oil and gas, and real estate sectors, primarily through comprehensive support on licensing, administrative procedures, and civil investigations. Simone Paschoal Nogueira demonstrates ‘remarkable technical knowledge’ of agribusiness, renewable energy, and forest investments, and directs the practice from her seat in São Paulo. Annelise Abi-Ramia Ferreras is commended for her work with the sanitation industry, and Iris Zimmer is well versed in climate regulation. Natasha Rosset left the firm in December 2023.Practice head(s):
Simone Paschoal Nogueira
Other key lawyers:
Testimonials
‘Excellent firm that assists with environmental administrative and judicial litigation and strategic consultancy issues.’
‘Annelise Abi-Ramia Ferreras is incredible both in her approach and availability, but mainly in her knowledge in the field of environmental law linked to sanitation.’
‘The team provides services that cover the core of the corporate business and is accurate in the company’s interests.’
‘Simone Paschoal Nogueira shows remarkable technical knowledge and an ability to understand the company’s business.’
Key clients
AES Tietê
EcoRodovias Infraestrutura e Logística
BRK Ambiental
DP World Santos
Grupo CCR
Grupo Solvi
Localiza Rent a Car
White Martins
Companhia de Transmissão de Energia Elétrica Paulista – CTEEP
Gerdau Aços Longos
Albioma Participações do Brasil
Light Serviços de Eletricidade
Work highlights
- Advised Grupo Solvi on environmental licensing processes, and defended the interests of the company before environmental agencies and municipalities regarding waste disposal.
- Assisted BRK Ambiental with environmental proceedings before the State Public Prosecutor’s Office, as well as environmental agencies and municipalities, regarding water supply and sewage treatment systems.
- Assisted ISA CTEEP with environmental proceedings before the Public Prosecutor’s Office, as well as environmental agencies and municipalities, regarding licensing, irregular occupations on environmental protected areas, vegetation suppression, and environmental offsets.
Brazil > Intellectual property Tier 4
Siqueira Castro – Advogados‘ IP practice is especially active in defending clients from piracy and misuse of trade marks and industrial designs. The team manages trade mark and industrial design portfolios for a diversity of local and international clients, including names from the automotive, food, commerce and retail sectors, and is often sought out for its experience in licensing agreements, anti-counterfeiting measures, and IP litigation. The team is led by Eduardo Ribeiro Augusto, whose expertise covers patents, trade marks and anti-counterfeiting.Practice head(s):
Eduardo Ribeiro Augusto
Other key lawyers:
Vinicius Cervantes Arruda
Testimonials
‘I believe that the dynamism and flexibility of the team are points that stand out, as well as the ability to collaborate well with other teams. In general, they are quick to respond to our questions and demands. It’s interesting to see a firm that leaves the bubble and manages to be open to outside the box solutions.’
‘Eduardo Ribeiro Augusto has an excellent vision of situations, can point out what needs to be improved and the best paths to follow, has excellent communication skills and the patience to reach a consensus.’
‘Eduardo Ribeiro Augusto and Vinicius Cervantes Arruda are both extremely proactive and advise in line with business objectives.’
‘It is a dedicated team that is always attentive to the client’s needs.’
‘The work of partner Eduardo Ribeiro Augusto stands out. He is always available to the client and very quick in conducting business and solving problems. Its team is also very qualified, which facilitates changes in the company’s day-to-day operations.’
Key clients
Vulcabrás Azaleia
Baterias Moura
Furukawa Electric
OVD Importadora e Distribuidora
Fundação Zerbini
Grupo Cortez
Metroform
Michelin
Kellogg
Business Software Alliance – BSA
Brand Monitor
October Very Own
Construtora Elevação
BBSeg
Mapfre Seguros
Alma Viva
Suva Collections
Iron Maiden
Copag
Britânia/Philco
Kalunga
Morlan
Tarkett
Kabum
Casa & Video
Ga.Ma Italy
Work highlights
- Advised Iron Maiden Holding on protecting its trade marks within Brazilian territory taking all necessary measures, notably cease and desist letters and lawsuits claiming for loss and damages.
- Advised Ga.ma Italy on a lawsuit against an Italian company called Gama Piu concerning a misuse of a trade mark.
- Advised Business Software Alliance and its members on protecting their software within Brazilian territory through civil search and lawsuits claiming for loss and damages against companies that were using illegal software.
Brazil > Real estate Tier 4
With expertise in rural, commercial and residential assets, Siqueira Castro – Advogados handles a varied real estate workload where acquisitions feature alongside construction disputes and property regularisation issues. Ana Luiza Taques draws on her previous experience as real estate legal coordinator of the Ministry of Defence to advise on the purchase and sale of real estate projects. She oversees the practice with Carlos Fernando Siqueira Castro, who is skilled in real estate, M&A and capital markets matters.Practice head(s):
Ana Luiza Taques; Carlos Fernando Siqueira Castro
Key clients
KPS Agropecuária
Enaxx Empreendimentos Imobiliários Ltda
Iguatemi Empresa de Shopping Centers S/A e Icatu Holding S.A.
Banco Opportunity
CONCAL – Construtora Conde Caldas Ltda.
Lwart Lubrificantes
Enel Distribuição São Paulo
OR Realizações Imobiliárias S.A.
BANIF – Banco Internacional do Funchal (Brasil) S.A.
Work highlights
- Represents Bartira Agropecuária in an action to review the terms of a real estate purchase agreement of an area of 12.240,00 ha.
- Represents Iguatemi Empresa de Shopping Centers S/A and Icatu Holding S/A in a lawsuit filed by Fuscaldo Participações LTDA.
- Represents Banco Opportunity in lawsuit filed by Sergio Farjalla related to the breach of contract of purchase and sale of property under real estate financing.
Tax > Tax advisory Tier 4
Siqueira Castro – Advogados 'provides a wide range of services' in the tax space, handling both litigation and consulting matters for a predominantly domestic client base. The team, which is split between Rio, São Paulo and Salvador, is recurrently sought out by companies from a host of sectors - including agribusiness, automotive, infrastructure, energy, education, financial services, technology, and oil and gas - for its expertise in the full range of local and federal taxes. The group is jointly led by four tax specialists: Maucir Fregonesi, who handles tax litigation and non-contentious issues concerning foreign investments; Marluzi Andrea Costa Barros and Gabriela Miziara Jajah, who focus on judicial and administrative proceedings; and Cristina Camara Macedo, who advises on international treaties, tax benefits and tax burden reductions.Practice head(s):
Maucir Fregonesi; Marluzi Andrea Costa Barros; Gabriela Miziara Jajah; Cristina Mancebo Câmara
Testimonials
‘Objectivity, clarity, support, guidance and transparency.’
‘Siqueira Castro provides a wide range of services with due speed in accordance with the client’s needs.’
‘Gabriela Miziara Jajah and Maucir Fregonesi are professionals of the highest calibre, qualified and professional to the extreme, always delivering technically impeccable work.’
‘Siqueira Castro has a specialised and benchmark service. The lawyers are attentive and diligent, have an excellent level of tax knowledge and at the same time act in a collaborative manner, always working for the best result for the company.’
‘Gabriela Miziara Jajah works strategically with a great deal of experience, is detailed, diligent, and precise in her analyses. Her accuracy and detail make a difference in the most complex cases.’
Key clients
Prefab Construções Prefabricadas Ltda.
Kellogg Brasil Ltda.
Peugeot Citroen do Brasil Automóveis Ltda.
Flextronics International Tecnologia Ltda.
Construções e Comércio Camargo Corrêa S.A.
Cooperativa Agroindustrial do Estado do Rio de Janeiro Ltda.
Novus do Brasil Comércio e Importação Ltda.
Electro Vidro S/A.
Midol – Mineração Dolomita Ltda.
Petrobras Transporte S/A
Fernandez S/A Indústria de Papel
Elekeiroz S.A.
Brazil > Labour and employment Tier 5
Siqueira Castro – Advogados ‘combines excellent technique with exceptional service‘ to assist clients with a range of labour litigation and consultancy matters. Labour and social security specialist Otavio Pinto e Silva is a key contact for strategic litigation matters and jointly leads the practice with André de Souza Santos.Practice head(s):
Otavio Pinto e Silva; André de Souza Santos
Testimonials
‘The Siqueira Castro Advogados team combines excellent technique with exceptional service, reflecting the client’s needs, anticipating situations.’
‘A firm with technical quality and agile service. The team is always attentive and qualified. The firm is known for sending out periodicals with legislative updates and brief guidance.’
‘The members of the team serve us with maximum efficiency, speed, agility and technical quality. They demonstrate outstanding legal knowledge and provide excellent advice. They are always very accessible.’
Key clients
SIGDO KOOPES – Ingieneria y Construccion
Prudential do Brasil Seguros de Vida S.A
Brasilseg Companhia de Seguros
Cotecna Serviços Ltda.
Colgate-Palmolive Brazil
Sistema de Implante Nacional
Procempa – Cia. de Processamento de
Dados do Município de Porto Alegre
TIM Brasil Serviços E Participações S.A (“TIMBrasil”)
Cielo – Companhia Brasileira De Meios De
Pagamento (“Cielo”)
Banco Rendimento S.A
Sociedade MICHELIN de Participações
Indústria e Comércio S.A
Brasturinvest Investimentos Turísticos S.A
White Martins Gases Industriais do
Nordeste Ltda.
Vibra Energia S.A
Dexco Group – Cerâmica Urussanga
Brasturinvest
Cotação Distribuidora De Títulos E Valores
Mobiliários S.A
BASF
Duratex S.A
Dynatrace Software Do Brasil
PA Omatapalo
Brazil > Corporate and M&A: Mid-market Tier 6
Siqueira Castro – Advogados is well positioned to handle a multitude of transactional matters and day-to-day corporate issues for a varied client base. In addition to M&A deals, the group is also skilled in corporate restructuring and commercial contracts. Heitor Faro De Castro and Sérgio Ricardo Fogolin jointly oversee the corporate and M&A practice.Practice head(s):
Heitor Faro de Castro; Sérgio Ricardo Fogolin
Work highlights
Brazil > Dispute Resolution: Litigation Tier 6
Siqueira Castro – Advogados‘ dispute resolution department is particularly active in damage claims, especially those arising from contractual breaches and environmental incidents. In addition, the team is known to represent clients in civil and commercial disputes across a number of sectors, most notably oil and gas, mining, construction, and infrastructure. Carlos Roberto Siqueira Castro co-heads the team with Daniela Soares Domingues; both are highly experienced in commercial and civil litigation involving debt recovery, restructurings, as well as regulatory and contractual disputes.Practice head(s):
Carlos Roberto Siqueira Castro; Daniela Soares Domingues
Other key lawyers:
Diego Barbati
Testimonials
‘The team at the Siqueira Castro plays a very high quality role in the relationship with its clients, generating constant added value. They developed an innovative and welcoming culture.’
‘Carlos Roberto Siqueira Castro – one of the most outstanding legal minds in Brazil. Brilliant, elegant, and, at the same time, cordial, humble and very well prepared. A reference for new starters and a constant inspiration for those who have already been in the market for years.’
‘The litigation team is extremely attentive and diligent, as well as highly qualified.’
Key clients
Associação Brasileira da Indústria de Águas Minerais – ABINAM
Companhia Distribuidora de Gás do Rio de Janeiro (CEG)
Usina Carapebus, Usina Barcelos and Usina Cupim
Slavel Distribuidora de Automóveis Ltda.
Vale S.A.
White Martins Gases Industriais do Norte Ltda.
Construções e Comércio Camargo Correa
Companhia Siderúrgica do Pecém (CSP)
Petrobras S.A.
Toyota do Brasil Ltda.
Dexco S/A
Prudential do Brasil Seguros De Vida S.A.
Cecrisa Revestimentos Cerâmicos (Dexco S/A)
Sociedade Michelin de Participações, Indústria e Comércio Ltda.
Roberta de Almeida Ramalho – Atthena
Embarcações Eireli Companhia do Metrô Da Bahia – CCR
VCB Energia S.A. (Mover Gourp)
Amil Assistência Médica Internacional S/A
Ambientare Soluções Ambientais
Elekeiroz S.A.
Work highlights
Siqueira Castro – Advogados > Firm Profile
With over 77 years of experience, SiqueiraCastro has been a key player in shaping Brazil’s legal landscape. The firm advises leading companies across key sectors—businesses that are actively driving Brazil’s development. This entrepreneurial spirit and sense of purpose fuel the firm’s commitment to delivering innovative legal solutions. More than specialists in the law, SiqueiraCastro understands the full scope of business challenges. That’s why the firm is a pioneer in delivering a full solution, end-to-end approach — combining legal expertise with strategic insight.
Areas of practice: Antitrust / Competition Law, Arbitration and Mediation, Asset Protection and Wealth Management, Compliance and Internal Investigations, Consumer Relations, Contracts, Corporate / M&A, Credit Recovery, Digital Law and Data Protection, Energy, Environmental Law, Family Law and Estate Planning, Financial and Capital Markets, Financial Operations, Government Relations, High-Volume Litigation, Intellectual Property, International Trade and Customs Law, Labor and Employment, Legal Management (Legal Controllership), Real Estate Transactions, Regulatory Law, Social Security Law, Strategic Litigation, Tax Law, White-Collar Crime.
International work: We are part of ADVOC, a worldwide network of independent law firms. Present in more than 90 countries, the entity is one of the most traditional and reputable in the legal world, with approximately 12,000 lawyers in the main cities on all continents. In Brazil, the network operates only from SiqueiraCastro.
Our firm was the founder and organizer of ADVOC in Latin America and kept working very closely with South America, Central America, the Caribbean, and Mexico members. Our global approach can be highlighted by partnerships and agreements that allow us to serve our clients on five continents, emphasizing the USA, China, Japan, Russia, India, Germany, France, Spain, and Portugal.
Awards: The impact of SiqueiraCastro in the legal and business worlds, besides being known by clients and by the market in general, is regularly recognised by specialised publications.
The following deserve special mention:
-
Recognized as one of the top law firms in Brazil by Chambers Brazil (2024), with 10 partners ranked among the country’s leading lawyers in their respective practice areas.
-
2 partners ranked among the world’s top lawyers in their fields by Chambers Global (2025), in addition to 5 ranked practices.
-
Ranked among Brazil’s top law firms in 14 practice areas by The Legal 500 Latin America (2025), with 29 partners recognized as leading lawyers.
-
Ranked among the best firms in 24 practice areas by Leaders League (2025), with 47 partners highlighted among the country’s top legal professionals.
-
Recognized in 12 practice areas by Latin Lawyer 250 (2025), with 22 partners named among Brazil’s leading lawyers.
-
Named one of the most admired law firms in Brazil by the ANÁLISE ADVOCACIA Yearbook (2025), with 12 awarded practice areas and 45 partners recognized as top professionals.
-
41 female partners recognized in ANÁLISE ADVOCACIA MULHER (2025), with 10 ranked practice areas.
-
Recognized among the top law firms in Brazil by ANÁLISE ADVOCACIA REGIONAL (2024).
-
Ranked as one of the leading firms in Tax Law in Brazil by World Tax – International Tax Review (2025), with recognition in 4 practice areas.
-
Ranked in Banking and Project & Development by IFLR1000 (2024).
-
5 partners recognized among Brazil’s top lawyers in their respective areas by Lexology Index Brazil (2025).
-
8 partners featured in 6 practice areas by LACCA Approved (2025).
-
Recognized among the best law firms in Brazil for Intellectual Property and Trademarks by WTR 1000 (2025).
-
Named Pro Bono Leading Light by Latin Lawyer for 15 consecutive years.
-
Second place in the “Social Responsibility and Pro Bono Initiatives” category of the Lumen Awards (2022).
-
Practice recognized in the DNA+FENALAW 2024 Awards in the categories of “Technology” and “Diversity and Inclusion.”
-
In 2023, received the Human Rights and Diversity Seal from the São Paulo City Hall for supporting diversity and inclusion initiatives.
Social responsibility: Besides the support given to clients’ business activities, SiqueiraCastro pay special attention to initiatives that have a positive impact on society. Support social assistance actions and programs to improve the quality of life of needy and disabled people. And the firm also provides free legal services (pro bono) on a permanent basis to charitable and philanthropic institutions in various Brazilian states. SiqueiraCastro have a Pro Bono Committee, organically implemented since the 1990s to support the firm’s efforts throughout Brazil. Besides this, concentrate the social responsibility and pro bono activities through the Maria Clara Institute, which pays for all initiatives in the country with funds from SiqueiraCastro.
We also have made dozens of partnerships with entities in the non-profit sector over the last years. Currently, the firm is partnering with more than 70 institutions around Brazil. Over the previous three years, we have applied an average of 80 monthly hours to pro bono assistance, representing BRL 2 million in attorney’s fees according to our hourly rates. We want to highlight four projects to your consideration:
Case 1 – Muiraquitã: Historically, in Brazil, there is a reality of marginalization and genocide of the natives of the region. In the 1970s, there was a shared sense that the complete disappearance of indigenous ethnic groups would be inevitable.
In this context, our firm’s pro bono work is to legally protect these people, enforcing a clear objective of our Constitution, which sought to end the era of cultural and physical extermination of the indigenous population through serious and adequate state protection.
With that in mind, we start working with the Guajajara ethnic group, located in the northeast state of Maranhão, in a police investigation initiated to identify recent murders of its indigenous leaders.
The tribe has been fighting to end a history of murders for a long time, which has increased exponentially in the last 20 years, putting their people under a regime of fear and insecurity.
In 2020, the Guajajaras notified five murders in just six months, and our firm worked to ensure the police investigations ran effectively. As a result of our quick and efficient support, the investigations were completed within a few months, with the preventive detention of two suspects and a complaint filed against them. We act in the same direction, now in the Criminal Action, seeking to guarantee the maintenance of preventive prisons for the village’s safety.
The entire Pro Bono Committee supervises the work of six lawyers dedicated to this case. They are part of our São Paulo and São Luís offices and take advantage of its technological apparatus to shorten distances applying a unified strategy and approach. We also financially invest in moving people to participate in hearings when necessary.
We are in constant contact with the victims’ families to provide support and information about the procedure. Until now, we dedicated 180 hours to this case. From a broad perspective, the suspects remain in custody, which brings a feeling of protection and justice to the village. Indeed, this work will help to inhibit other criminal acts and murders.
This case leads us to sponsor the case of Juma, who is also an indigenous leader in the region of Altamira (Pará). We work on two complementary fronts: legal support in a case of domestic violence perpetrated by her ex-husband; and ii) guidance on threats and other crimes, including theft and home invasion, to which Juma has been a victim because of her political position.
We plan to keep working with indigenous tribes to assist them in their criminal demands. As a result of participating in this project, we could already carry out similar work with the Kaingang tribe, located in the country’s southern states.
Case 2 – True colors: In a country full of inequalities, pro bono legal assistance is an effective way to guarantee access to justice for those who need it most, as is the case with Miss Bruna dos Santos Guimarães.
At 29 years old, Bruna has a rare disease called Leber’s Congenital Amaurosis. It is a genetic eye disorder that primarily affects the retina. People with this condition typically have severe visual impairment until total blindness.
After years of research, an innovative treatment based on gene therapy emerges as a solution for this disease. Developed by the Spark Therapeutics laboratory in Pennsylvania (USA), the drug Luxturna® can reduce symptoms and even completely reverse the condition of blindness until then inevitable. But some issues keep Bruna away from this treatment:
- Luxturna® was only registered by The Brazilian Health Regulatory Agency (Anvisa) in August 2020;
- The Drug Market Regulation Chamber (CMED) stipulated the maximum price of Luxturna®, in December of the same year, at almost BRL 2 million per dose;
- The drug is not part of the public health system (SUS) list and Bruna does not have financial conditions for its acquisition, nor to pay for the surgical procedure necessary for its application;
- The later the drug is applied, the more cells can be compromised, affecting its effectiveness (the medical recommendation for the treatment is until the age of 30).
With the technical support of Instituto Retina Brasil and Hospital Israelita Albert Einstein, SiqueiraCastro Advogados took over Bruna’s case and pleaded in her favor against the Union. Thus, despite some similar cases being processed in court, for the first time, it was determined that the Federal Government should bear the costs of acquiring two doses of Luxturna®, which the Union fulfilled at the beginning of May.
Bruna received her treatment at the Albert Einstein hospital in São Paulo, the first product application in all Latin America.
Case 3 – Broken chains: This project aims to provide practical tools for companies to implement programs to support employees who are victims of domestic violence, demonstrating that such initiatives can generate greater engagement and good commercial results. To this end, we created free training sessions with clear guidelines to encourage companies and employees to participate, ensuring full support from our team in any event related to the topic.
The pro bono project was conceived based on dialogues about challenges faced by our clients and the growing willingness of these companies to engage in the fight against domestic violence actively. Competing firms have already replicated it under the ESG bias – which, although it may compromise the pro bono character, is very positive, as it is a topic that deserves special attention and only benefits from the diversity of agents willing to help.
Companies have already called upon us nationwide to provide specific training on the subject and design support programs for female employees who are victims of domestic violence. We keep doing it on a pro bono basis.
We also publish an article in a top-tier newspaper addressing the importance of companies keeps their eyes on the issue. In addition, we disseminated the subject internally, emphasizing our full support for women and men who might face cases of violence in their homes.
Case 4 – Pregnant behind bars: The pre-emptively arresting of Miss Jessica Monteiro in early 2018 happened six days before she gave birth. After significant repercussions in the media, she received the benefit of house arrest. However, in 2020, Jessica was sentenced to 20 months in prison and, although she is still on house arrest (for 43 months), the lower court refused to release her, determining the arrest. The situation is even more delicate considering that Jessica could appeal. Still, she didn’t because her lawyer, constituted in the records, stopped responding and defending her when she could no longer pay the fees. In addition to interrupting legal assistance, the lawyer failed to inform her of the need to seek another defender, allowing the flow of the procedural deadline. In this context, we’re sponsoring her interests, and, for now, we await the habeas corpus judgment session, in which we’ll hold an oral argument.
Clients: The firm assists more than 3,000 national and international clients that are active in different sectors, including banking, pharmaceutical, petrochemical, communication, automotive, construction, shipping, insurance, oil and gas, energy, IT, entertainment, aviation and transportation.
Main Contacts
Department | Name | Telephone | |
---|---|---|---|
Main partners | Carlos Roberto Siqueira Castro | [email protected] | 55 11 2223-8818 |
Main partners | Carlos Fernando Siqueira Castro | [email protected] | 55 11 3704-9840 |
Main partners | Gustavo Gonçalves Gomes | [email protected] | 55 11 3704-9840 |
Main partners | Heitor Faro de Castro | [email protected] | 55 11 3704-9840 |
Main partners | Eduardo Ribeiro Augusto | [email protected] | 55 11 3704-9840 |
Main partners | Marluzi Andrea Costa Barros | [email protected] | 55 71 3507-9100 |
Main partners | Daniela Soares Domingues | [email protected] | 55 21 2223-8818 |
Lawyer Profiles
Photo | Name | Position | Profile |
---|---|---|---|
![]() |
Mrs Daniela Afonso | Partner | View Profile |
![]() |
Mr Guilherme Reisdorfer | Partner | View Profile |
![]() |
Mrs Marina de Araújo Lopes | Partner | View Profile |
![]() |
Mr Francisco de Assis Brito Vaz | Partner | View Profile |
Staff Figures
Other fee-earners : 879 Total staff : About 1,000Languages
Portuguese English French SpanishOther
Contacts : 80- City focus - Fortaleza > Leading firms
Top Tier Firm Rankings
- City focus - Manaus > Leading firms
Firm Rankings
- City focus - Brasilia > Litigation
- City focus - Salvador > Leading firms
- Tax > Tax litigation
- White-collar crime and investigations