Firm Profile > TUNCA ATTORNEY PARTNERSHIP > Ankara, Turkey


Turkey > Energy Tier 3

TUNCA ATTORNEY PARTNERSHIP brings its combination of public and private expertise to bear in the energy sector, advising government departments and corporates on energy projects, transactions and regulatory compliance, alongside representing clients in litigation and before Turkish regulatory authorities. The team is particularly active in the renewable energy sector, advising on project financings and plant acquisitions. The team is led by Sidar Tunca.

Practice head(s):

Sidar Tunca


‘A trustworthy firm. We have had serious business challenges in the past few years, and Sidar Tunca’s firm has managed these in an unexpectedly smooth and beneficial way for us. We trust their competence, knowledge and ability to handle problematic situations.’

‘Our company has important projects in the energy sector. Tunca Attorney Partnership understand our needs, communicate easily with us and answer all our requests with speed. The dialogue between the client and lawyer is very important for us and Sidar Tunca managed to organise very good dialogue with our company.’

‘The combination of very good legal expertise and personal and ethical qualities is important for thelawyer-client relationship That makes them different from the other lawyers we had previously worked with. When you work with Tunca you can easily see the difference, because they really care about your business.’

‘Excellent law firm – we recommend them for their practice in energy topics.’

‘Sidar Tunca is very well organised, understands our problems and concerns and give us satisfactory results.’

‘Although he is the head of the law office, Sidar Tunca is personally engaged with our company. That is very important for us. We are satisfied with our work with them. That is why we entrust them with our biggest investments.’

Key clients

The Ministry Of Energy And Natural Resources Of Turkey

Türkiye Petrolleri Dağitim

Limak Holding

Akfen Yeni̇lenebi̇li̇r Enerji̇

Lukoi̇l Eurasi̇a Petrol

Itc Invest Tradi̇ng & Consulti̇ng

Lokal İnşaat Enerji̇ Petrol Nakli̇yat

Hypco Petrolcülük

Özaltin İnşaat Enerji̇

Özkar İnş

Ftz Akaryakit Otomotiv


Turkey > Employment Tier 4

TUNCA ATTORNEY PARTNERSHIP handles a mix of contentious and non-contentious employment work, supporting clients ranging from corporates to government entities, notably the Turkish Ministry of National Education. Matters include employee contracts and recruitment, termination agreements and litigation, and cross-border issues such as employee transfers. The team is led by Sidar Tunca and  Sefa Demirci.

Practice head(s):

Sidar Tunca; Sefa Demirci


We have been working with Tunca Attorney Partnership for years because of the high quality of work. Since we serve a wide variety of sectors, such as constructıon, transportatıon, energy, tourism and agrıculture, we need a professional legal team to represent us in litigation and corporate matters. Tunca Attorney Partnership provides excellent legal services.

Tunca Attorney Partnershıp is a new generation law office with broad vision. Their approach to each case is multidimensional. They have expertise in many fields so they comprehend the problems very skilfully. They are very flexible and easily adjust to their clients.’

Sidar Tunca is very devoted to his clients and a professional person. He also manages to transfer that discipline and devotion to his team of lawyers.

The TUNCA team consists of young and successful lawyers who are very energetic and careful with our cases in courts. Their most distinctive strength and capability are to identify and detect the potential risks in our businesses. So we always find a chance to avoid unnecessary risks and save our firm from damages.

Sidar Tunca always makes us feel secure in terms of legal areas and results. He knows the importance of the topics and gives high importance to work on them. He always give attention to our business and follow up the legal matters.

Sidar Tunca is in the heart of all the work, the team, the discipline, and the professional approach.

Key clients

Turkish Ministry of National Education

Abdi İbrahim İlaç

Özdoğan Enerji

Atasay Otel Restoran Turizm

WYG International

Elvan Gıda

Icc Grup İnş

Tefirom İnşaat Enerji

Çalkan İnşaat

Ulubol İnşaat

Turkey > Dispute resolution Tier 5

TUNCA ATTORNEY PARTNERSHIP represents a diverse client base, including energy suppliers, constructors, telecoms providers, and pharmaceutical companies, in commercial disputes and international arbitration. Contacts in the team include Sidar Tunca Sefa Demirci, Ayşegül Filiz, and S. Elif Ozturk, who specialises in international arbitration.

Practice head(s):

Sidar Tunca; Şirin Elif Ozturk; Sefa Demirci; Ayşegül Filiz


‘They always get back to us on a short notice and manage to fit in tight deadlines we request from them. The lawyers are very well organised, they took part in each meeting we request, they come very well prepared. They give understandable instructions to our employees’

‘Mr. Sidar Tunca is among the most respected attorneys in Ankara. He knows what should be done to solve the problem. He is pragmatic, energetic and always ready to help. Mr Tunca is looking at each project from all possible angles, foresees the possible complications and gets ready for them in advance. His strengths are construction, energy and tax litigations. Mr. Sefa Demirci is very practical and knowledgable lawyer. ’

‘The dialog between the client and attorney is very important for us and Sidar Tunca managed to organise very good dialog with our company. In addition to these, Tunca Attorney Partnership adopts effective and fast ways in the dispute resolution process and offers us these ways without high costs.’

‘Tunca deals all kind of our disputes. Corporate law, labor law, contracts, construction etc. One of the advantages of team of Tunca is they all are very talented on mediation. I prefer solve the disputes before end up court and they provide it.’

‘Sidar Tunca and Tunca Attorney Partnership were recommended to me by other company in our sector. After the excellent job they did for us now I recommend them. Very professional, smooth communicating team of young and enthusiastic lawyers.’

‘Sidar Tunca is the kind of lawyer that makes you feel calm, cared and confident that your work will be done in the best possible way. He is very dynamic and never postpones any matter.’

Key clients

Limak Holding

Akfen Yeni̇lenebi̇li̇r Enerji̇

Türki̇ye Petrolleri̇ Dağitim

Lukoi̇l Eurasi̇a Petrol

Ern Holdi̇ng

Abdi̇ İbrahi̇m İlaç

Taca İnşaat

Gürbağ İnşaat Mühendi̇sli̇k Madenci̇li̇k

Atasay Kuyumculuk

Gökova Ören Mari̇na

Ftz Akaryakit Otomoti̇v

Tr Pharm

Teleses Telekomüni̇kasyon

Premar Gayri̇menkul

Mke Ankaragücü Gençli̇k Ve Spor Kulübü Derneği̇

The firm: TUNCA LAW OFFICE was established in 2006 by Sidar Tunca. Starting mainly with litigation, public law, public procurements, and government contractor services areas of practice, the firm has emerged as one of the most prestigious Ankara-based full-service law offices.

We have 40 attorneys at law and advisers working in our main office in Ankara, Turkey and newly launched office in Istanbul. Our national network consists of partner offices in major locations in Turkey such as Izmir, Bursa, Adana and Antalya.

TUNCA LAW OFFICE advises a wide spectrum of government institutions and businesses and their stakeholders, ranging from medium-sized owner-managed businesses to large public companies and multinational corporations. Special focus is related to PPP Projects, Energy and natural resources, Corporate and commercial and Dispute resolution including ADR.

In 2017 TUNCA LAW OFFICE added International Business and Commercial Law and International Investment and Commercial Arbitration divisions to its practice. While as an entity TUNCA LAW INTERNATIONAL ( was established just a year ago, it combines the prominent experience of its local lawyers with the international experience of a dynamic team composed of highly specialized lawyers and legal advisers from various countries, whose legal expertise includes international investment law, corporate and business law, public and private international law, and international arbitration law.

Areas of practice
Energy and natural resources: TUNCA LAW OFFICE advised some of the major transactions in the energy sector including renewable energy projects. Our expertise in this area covers all aspects of power plant projects, oil and gas and the minerals industries. We represent a broad range of interests in the energy sector such as generators, gas and energy traders and marketers, energy service providers, pipeline companies, industrial and commercial customers, investors, public entities and others in connection with the structuring, financing, regulatory approval and operation of power plants, energy market-related contract law, regulatory matters and litigation.

Corporate, mergers and acquisitions: TUNCA LAW OFFICE provides domestic and foreign clients with a full range of Turkish corporate and commercial legal advisory services (contracts, corporate law, corporate services, M&A and capital markets).

Construction and real estate: TUNCA LAW OFFICE’s expertise in construction covers Build-Operate-Transfer projects, public and private tenders, concession contracts, joint ventures, construction contracts, subcontracts, license agreements, project management agreements, operational management agreements, contract administration, claim management and, where necessary resolving disputes through court litigation. The legal counselling provided by our experts assists clients through all phases from development to completion of real estate and infrastructure projects, including large scale ones, implemented in various regions of Turkey.

Intellectual property and telecommunications: We provide proactive and strategic advice on how companies can protect and enforce their intellectual property rights in copyright, trademarks, patents, trade names, domain names, design and know-how. Our lawyers have extensive experience in telecommunication-related regulatory matters; negotiating and drafting intellectual property agreements, licensing agreements, transfer agreements of registered trademarks and patents, technical assistance agreements, technology transfer agreements, management agreements, distribution agreements, and franchising agreements.

International business and commercial law: TUNCA LAW INTERNATIONAL provides strategic business consulting for complex cross-border trade and investment projects. For each matter, we build an operational team of lawyers admitted in the concerned jurisdiction and advisers on Bilateral Investment Treaties and Multilateral Investment Treaties. Thus, we ensure we provide innovative consulting services to address the needs of our clients and partners.

Department Name Email Telephone
Capital Markets & Competition Sidar Tunca +90 312 427 24 02
Compliance S. Elif Öztürk +90 312 427 24 02
Contracts Ayşegül Filiz +90 312 427 24 02
Construction and Real Estate Sidar Tunca +90 312 427 24 02
Corporate, Mergers and Acquisitions Sidar Tunca +90 312 427 24 02
Corporate, Mergers and Acquisitions Ayşegül Filiz +90 312 427 24 02
Corporate, Mergers and Acquisitions Ayşe Gül Hacıoğlu Avcı +90 312 427 24 02
Dispute resolution: litigation and mediation Sidar Tunca +90 312 427 24 02
Dispute resolution: litigation and mediation Ayşegül Filiz +90 312 427 24 02
Dispute resolution: litigation and mediation Ceren Uzun +90 312 427 24 02
Dispute resolution: litigation and mediation Ayşe Gül Hacıoğlu Avcı +90 312 427 24 02
Dispute resolution: international arbitration S. Elif Öztürk +90 312 427 24 02
Energy Sidar Tunca +90 312 427 24 02
International business and commercial law S. Elif Öztürk +90 312 427 24 02
Intellectual Property Ceren Uzun +90 312 427 24 02
Public Procurement & Administrative Law Sidar Tunca +90 312 427 24 02
Tax Law Sidar Tunca +90 312 427 24 02
Photo Name Position Profile
 S. ELIF ÖZTÜRK  photo S. ELIF ÖZTÜRK Partner for International Law and Head of the International Arbitration practice
 SIDAR TUNCA  photo SIDAR TUNCA Founding Partner


CLIENT: Gül Özdinç, Chief Legal Counsel
COMPANY/FIRM: OMV Samsun Elektrik Üretim San. ve Tic. A.S.
TESTIMONIAL: We have been working with Sidar Tunca since 2007. He advised some of our major projects including OMV Samsun Electricity Natural Gas Combined Cycle Power Plant, constructed by over 600 million Euros and has 890 MWe power capacity. Sidar is not only very experienced lawyer, but also entirely devoted to his clients and their needs.

CLIENT: Serdar Bacaksiz, Member of Board of Directors
COMPANY/FIRM: LIMAK, Limak Enerji Ticareti A.S.
TESTIMONIAL: Tunca Law Office handles our corporate matters since 2012. As a group of companies with many investments abroad, our construction and energy projects require effective solutions often concerning more than one jurisdiction. Tunca Law Office provide us with top tier international law firm quality service in proactive and timely efficient manner.

CLIENT: Cihan Kamer, Chairperson of Board of Directors
TESTIMONIAL: Sidar Tunca and the law office leaded by him handled many of our business transactions. He is reliable and trustworthy, knows our company and our business and present us effective solutions.

CLIENT: Ali Özdogan, Member of Board of Directors
TESTIMONIAL: Precise, result oriented, innovative and devoted that is how we can describe Tunca Law Office’s team. They provide Özdogan Group of companies with legal consulting services on matters related to Energy law, Trade law, Construction and Employment Law and represent our interests in many litigations. When you lead group of companies operating in different industries the last you need to hear from your lawyer is “ it is not possible”, Sidar Tunca’s approach is “we can do” and that makes him the preferred legal adviser for us.


Sidar Tunca, Founding and Managing Partner

Founding and Managing Partner Sidar Tunca, explains how the Firm is adapting to its growth strategy and clients’ changing needs.

What do you see as the main points that differentiate TUNCA ATTORNEY PARTNERSHIP from your competitors?

In our view, simple professional competence, when unsupported by in depth understanding of the corporate individuality of the client, is not enough to meet their long-term needs. We apply the same dedication to all our clients – a sole trader or a multinational corporation, each of our clients is equally valuable for us, because we treat them as a family. Each of our client knows that no matter what business challenges they face, we as “TUNCA LAW OFFICE” family will stay by their side and they can always rely on our support. This is not an approach for business development, it is part of our tradition that we value most. That explains why most of our clients are long-term clients.

Which practises do you see growing in the next 12 months? What are the drivers behind that?

Given the latest developments in the Turkish legislation, namely the announcement of the starting dates for the obligation to register with the Data Controllers Registry (“VERBİS”) and the growing importance of the specific EU Regulations, GDPR, we see Data Protection to be among the fastest growing legal practices for Turkey. To meet the needs of our clients, which have significant interaction with EU residents, either directly or as a vendor, we joined our efforts with our partner office in Paris to provide Data Privacy Compliance Consulting.

Civil Aviation Law is another sphere of law where specialized consultancy will be needed. The third international airport in Istanbul is now complete, the production and use of unmanned aerial vehicles is increasing in Turkey, new significant investments are at planning phase, so we expect that expertise in this field will be needed and invest efforts in the qualification of our legal team in order to present high level consultancy in this specific area.

The undisputed position of Turkey as crossroad of various energy routes means that Energy Law is a constantly growing area of expertise. We expect increasing numbers renewable energy projects not only in our country, but in the region also.

The last few years show upward trend of Turkey as a preferred place for international commercial arbitration and we believe this trend will continue in the next years. The arbitration friendly domestic legislation and the growing popularity of ISTAC (Istanbul Arbitration Center) attracts companies that need fast, cost saving and predictable dispute resolution.

Cross border investments consultancy will continue growing with special focus on Middle East and Chinese enterprises.

What’s the main change you’ve made in the firm that will benefit clients?

The most significant change we made in the last year was establishing our International Law practice. Since its establishment in 2006 TUNCA ATTORNEY PARTNERSHIP had been focusing mainly on Turkish Law. In order to serve the increasing needs of our clients on matters related to trade policy, and business and economic relations issues involving Turkish businesses engaged in foreign investment projects we joined our practices with Mrs S. Elif Ozturk – adviser in international law with over 16 years professional experience. As a result, Tunca Law International LLC ( ) was set up. Now we provide specially tailored consultancy that we named “several countries – one office”. To illustrate with an example, our client company representative comes to our Ankara office and there receives update on ongoing litigation in Turkish courts; advising, concerning his trading activities in Russia by Russian lawyers; conducts consultations via videoconference with lawyers in Paris or Washington for his pending arbitration case in ICC or ICSID, without having to travel to different countries for this. This saves both time and cost for our clients.

Is technology changing the way you interact with your clients, and the services you can provide them?

Technology is changing each sphere of our lives including the professional. Case management solutions, protecting data transfers, video and teleconference communication systems, shared platforms and reporting tools – we invest in various technology solutions that make our interaction with the clients more efficient and secure.

Can you give us a practical example of how you have helped a client to add value to their business?

We invest efforts to change the perception of the lawyer as “emergency worker coming for lifesaving operations”. While the big corporate companies take into account the importance of the strategic business legal consultancy, the middle level enterprises in our country still rely on their in-house counsels to handle all legal issues and seek established Law Offices only when, for example, the matter is already in court or a decision was already rendered against them in arbitration proceeding in foreign jurisdiction. This approach is erroneous.

Cost saving on legal services in the short term always leads to negative balance at the end.
Among the main factors for running successful business is involving the specialized lawyers’ opinion in the business decision making process. As we know well the business of our permanent clients, we follow and regularly provide them with analysis on all developments in the sector regulations, in the legislations of the foreign countries they invest or trade with. Thus, we help them better navigate the changing and complex legal environment.

Are clients looking for stability and strategic direction from their law firms? – where do you see the firm in three years time?

Growing TUNCA ATTORNEY PARTNERSHIP from a few practicing attorneys to a full-service law firm, as it is now, we aimed to provide our clients with the full range of legal expertise they might need. We will continue adding value to our practice, engaging with strategic partnerships and investing in the coming generation of lawyers via the programs for supporting the legal education of young students.

In the next three years TUNCA ATTORNEY PARTNERSHIP is aiming to engage more actively in law based projects of civil society organizations and international networks of professionals.