Firm Profile > CMS > Lisbon, Portugal

1050-218 LISBON

Energy and natural resources Tier 1

CMS is adept at handling the most challenging matters, with a proven track record in assisting domestic and international clients with the implementation of renewable energy projects, cross-border M&A transactions, regulatory issues, as well as litigation proceedings against the government. The department counts some of the leading players in the energy sector among its clients, demonstrating specialist knowledge across natural gas and electricity. Energy expert Mónica Carneiro Pacheco leads the team, which is also well versed in oil and gas matters in Africa. João Marques Mendes left the firm in 2020.

Practice head(s):

Mónica Carneiro Pacheco


A specialised team with a lot of experience in public procurement procedures, in particular in the energy sector. Lawyers are very professional and efficient.

CMS has a unique approach to problems. The team always tries to view things from the clients’ standpoint.

A very reactive and open-minded team that always seeks to find solutions which match clients’ expectations.

Mónica Carneiro Pacheco has deep expertise in the legal energy sector.

Key clients

EDP Energia de Portugal

EDP Gestão da Produção de Energia

EDP Comercialização

REN Redes Energéticas Nacionais, SGPS, SA

Acciona Energia


Helexia Development

Galp Energia, SA

Aquila Capital

SDCL – Sustainable Development Capital Limited

Caixa de Crédito Agrícola


Simplewatt / MXT Solar

Grastim J.V. SRL

Tagusgás – Empresa de Gás do Vale do Tejo, S.A.

Capital markets Tier 2

CMS advises on a wide range of equity and debt capital markets deals, securitisation and regulatory matters. The team fields specialist knowledge in cross-border transactions. Francisco Xavier de Almeida is a name to note.

Commercial, corporate and M&A Tier 2

With a strong track record in the private equity and venture capital markets, CMS regularly advises on both domestic and multi-jurisdictional M&A transactions, while also offering assistance in relation to clients' commercial activities and restructuring of their businesses in Portugal. Francisco Xavier de Almeida leads the team; he focuses on privatisations, M&A and corporate finance. Co-head João Caldeira often heads multi-disciplinary teams on cross-border deals, and has specialist knowledge in corporate restructuring, risk capital and joint ventures.

Practice head(s):

João Caldeira; Francisco Xavier de Almeida

Key clients

Vinci Highways

Crest Partners

Aquila Capital



Amorim Luxury Group


Massilly Holding

FCE Bank plc


ANV Global Services Ldt.

Mercedes-Benz Financial Services Portugal – Sociedade Financeira de Crédito, S.A.

Dispute resolution Tier 2

With comprehensive expertise in contractual litigation and arbitration, the dispute resolution team at CMS is noted for its ability to handle disputes concerning commercial, pharmaceutical and construction issues. The practice receives recurring instructions from international banks and private hedge funds, and is strong in international arbitrations, with a particular emphasis on M&A, energy and shareholder disputes. The department is under the leadership of Nuno Pena, an expert in civil, commercial, corporate and banking litigation. The service offering was bolstered by the arrival of Cuatrecasas' former practice head Miguel Esperança Pina, who brings a wealth of experience in arbitration and litigation arising from corporate, financial and commercial disputes, among others. Rita Gouveia, who also joined from Cuatrecasas, is active across domestic and cross-border contentious matters. Joaquim Shearman de Macedo left the firm in 2020.

Practice head(s):

Nuno Pena

Key clients

Acciona Group

Attestor Capital LLP



EDP – Gestão da Produção de Energia

Endesa Generación

Goldman Sachs International

Meo – Serviços de Telecomunicações e Multimédia

Oxy Capital

Sporting Club de Portugal

Employment Tier 2

Showcasing a strong track record in restructuring operations, CMS offers advice to clients across a variety of industries, namely financial services, insurance, hospitality, pharmaceuticals, transport and aviation. The team also excels in high-profile collective dismissal cases, demonstrating the ability to efficiently negotiate with unions and works councils. Susana Afonso Costa leads the practice; João Gomes is another key practitioner.

Intellectual property Tier 2

CMS is particularly active in the prosecution and enforcement of trade marks, but also has experience in patent litigation cases, as well as anti-counterfeiting issues. Other notable areas of practice include internet and domain names. José Luís Arnaut is the name to note.

Public law Tier 2

Public procurement and administrative contracts are core areas of practice for CMS's public law team, which is equipped to advise clients operating in a range of highly regulated sectors such as water, energy, health, transport and telecoms. Gonçalo Guerra Tavares is the key name.

Banking and finance Tier 3

Domestic and international banks, multilateral institutions and corporates seek CMS's advice on a range of finance transactions, encompassing syndicated loans, acquisition and leveraged finance, debt products as well as real estate and project financing matters.

EU and competition Tier 3

Advising clients from the outset of deals, CMS's broad service offering covers merger control matters, state aid issues, dawn raids, and all aspects of regulatory law and compliance matters. The team is particularly experienced acting for consumer goods companies and has a proven track record in distribution agreements. Luís Miguel Romão is the name to note.

Insolvency and restructuring Tier 3

Aided by its international network of experts, CMS is well placed to handle complex, cross-border restructuring and insolvency work for leading banks, distressed debt investors, private equity firms, creditors and businesses.  Joaquim Shearman de Macedo left the firm in June 2020.

Practice head(s):

Miguel Esperança Pina; Nuno Pena; Rita Gouveia

Key clients

Banco Comercial Português

Caixa Económica Montepio Geral

Chamartín Group

Discovery Real Estate Fund, SICAV-FIS

Explorer Investments, S.A.

J. P. Morgan Securities PLC

Goldman Sachs International

Perpeturbana , S.A.

Massilly Holding SAS

Moneygram Payment Systems, INC

Davidson Kempner European Partners, LLP

Farallon Capital Europe LLP

Starship, LLC

Tax Tier 3

With its international presence, CMS is well placed to advise on cross-border transactions and restructurings for national and international clients. VAT and other indirect tax matters are also a central area of expertise, as are complex tax disputes. Patrick Dewerbe is the key contact.

Angola > Foreign firms Tier 3

The Angola desk at CMS advises on projects in the real estate, tourism, energy and oil and gas sectors. The team, which is led by Patrick Dewerbe and Tiago Machado Graça, also advises clients on day-to-day corporate and commercial matters. FTL Advogados is the local partner.

Practice head(s):

Patrick Dewerbe; Tiago Machado Graça


The firm is client-centric and follows up closely on the scope assigned to them. Good communication to update the client on the timeline anticipated.

Rui Pena, Arnaut & Associates is a proud member of the global CMS team, a world leading group ranked amongst the Top 10 Global Law Firms. Given its presence in more than 40 countries, the group has been able to built its knowledge and experience on international law. Being part of the CMS group has put our law firm in the unique position of being able to provide our clients with a combination of excellent legal services and expertise across several jurisdictions, while upholding the highest international standards.

Our firm is composed of a multidisciplinary legal team that not only has vast expertise on a multitude of legal practices, but is also committed on using the judicial knowledge acquired over the past 50 years, towards the development of practical and efficient strategies suited to the needs of our clients. We indeed possess the unparalleled ability of establishing very strong trusting relationships with our clients and are always committed to providing a result focus personalised service.

Furthermore, we provide support to companies looking to modernise their business with the development of a more sustainable and socially responsible business model, allowing them to keep up with the several changes brought by the new digital era.

Finally, our law firm believes in the creation of a diverse workforce determined to contribute towards the enrichment and innovation of the service provided while also retaining the best talent.

Department Name Email Telephone
Banking and finance António Payan Martins
Commercial, corporate and M&A | Capital markets | Private equity Francisco Xavier de Almeida
Commercial, corporate and M&A | Capital markets | Private equity João Caldeira
Competition and EU Law Luís Miguel Romão
Dispute resolution (including arbitration) | Insolvency and restructuring | Insurance Joaquim Shearman de Macedo
Dispute resolution (including arbitration) Nuno Pena
Employment and pensions Susana Afonso
Energy and natural resources Mónica Carneiro Pacheco
Insolvency and restructuring Nuno Pena
TMC – technology, media and communications | Intellectual property and life sciences José Luís Arnaut
Public law Gonçalo Guerra Tavares
Real estate and construction Luís Abreu Coutinho
Tax Patrick Dewerbe
Photo Name Position Profile
Mrs Susana Afonso  photo Mrs Susana Afonso Partner and Head of
Mr João Caldeira  photo Mr João Caldeira Partner and Co-Head of the Corporate and M&A practice
Ms Mónica Carneiro Pacheco  photo Ms Mónica Carneiro Pacheco Co-Head of the Energy & Environment Practice Area, Mónica Carneiro Pacheco has…
 Luís Miguel Romão  photo Luís Miguel Romão Partner and Head of
Mr Francisco Xavier de Almeida  photo Mr Francisco Xavier de Almeida Partner and Co-Head of Corporate and M&A.
Number of lawyers : 150
Other offices : Funchal
Other offices : Luanda