
Develioglu & Dag, recognized as one of the oldest premier law firms in Turkey, was established in 1953. Since its establishment, the firm has been dedicated to providing a comprehensive range of legal services to elite corporate clients across various sectors.
Our firm offers legal consultancy and guidance to both domestic and international clients, specializing mainly in areas such as Corporate Law, Banking and Finance Law, Capital Markets Law, Data Protection Law, Blockchain and Crypto Currency Law, Anti Damping Law, Competition Law, Privatization Law, Contract Law, Telecommunications Law, Tax Law, Labour and Social Security Law, Insolvency and Bankruptcy Law and Project Financing.
Our firm offers comprehensive legal services by German, English and French speaking attorneys. In addition to employing attorneys registered with foreign Bar Associations, our firm has a longstanding collaboration on various projects with numerous international law firms.
Our objective at Develioglu & Dag is not to become the largest law firm in Turkey in terms of the number of attorneys. Rather, we aspire to be the law firm of choice for clients seeking the highest quality legal guidance available.
Our focus is on building lasting relationships with our clients, understanding their unique needs, and providing tailored solutions that drive their success. We believe that true excellence in legal services is achieved through dedication, expertise, and a commitment to our clients’ best interests.
Practice areas
Business
At Develioglu & Dag, we provide integrated legal services at the intersection of corporate and financial law, advising clients on structuring, managing, and financing their businesses in compliance with Turkish and international legal frameworks. Our combined practice offers seamless support for both day-to-day corporate operations and complex financial transactions.
We represent domestic and international companies in share transfers, mergers, acquisitions, corporate restructurings, and joint ventures—often with a financing component involving secured lending, project finance, or syndicated loans. Our team drafts and negotiates shareholders' agreements, financing contracts, collateral structures, and related corporate governance documents, ensuring alignment between commercial objectives and regulatory requirements.
In the financial sector, we advise borrowers, lenders, and investors on regulatory compliance, cross-border lending, capital markets, and debt restructuring. We have a strong track record in assisting clients before the Banking Regulation and Supervision Agency (BDDK) and other regulatory bodies.
By combining our deep knowledge of company law with technical finance capabilities, we are well-positioned to support complex transactions that require both legal precision and commercial insight. Our sector-specific experience—particularly in fintech, energy, and industrial manufacturing—allows us to deliver tailored solutions that address both operational and financial needs.
Lawsuits & Disputes
Develioglu & Dag represents local and international clients in a wide range of litigation and enforcement matters, with a particular focus on complex commercial disputes, debt recovery, and bankruptcy procedures. Our team provides strategic legal representation at every stage of contentious matters—from pre-dispute negotiations and mediation to trial and appellate litigation.
We have extensive experience handling commercial litigation, including contractual disputes, shareholder conflicts, product liability, and unfair competition cases. Our litigation team is recognized for its tailored, result-oriented approach and deep understanding of the sectors in which our clients operate.
In enforcement and debt recovery matters, we support creditors in executing judgments, securing assets, and initiating compulsory collection procedures. We also represent clients in bankruptcy proceedings, creditor committees, and restructuring processes, ensuring their rights are protected throughout insolvency procedures.
A distinctive feature of our litigation practice is our proactive involvement in pre-litigation alternative dispute resolution. We frequently resolve matters through successful mediation or direct negotiations, minimizing costs and reputational risk for our clients.
Our recent track record includes achieving a high success rate in labor litigation for leading industrial clients, defending against mass insurance recourse claims, and winning unfair competition cases involving IP and trade secret violations.
Media, Technology and Telecoms
Develioglu & Dag provides integrated legal services at the intersection of telecommunications and data protection law, advising telecom operators, tech companies, cloud service providers, and digital platforms operating in Turkey’s regulated market.
In the field of telecommunications, we assist clients with ICTA licensing, frequency allocation, interconnection, infrastructure sharing, compliance with network security regulations, and contractual matters such as SLAs, roaming agreements, and MVNO arrangements. Our team also represents clients in regulatory audits, administrative disputes, and legal challenges involving unfair practices or consumer protection issues.
In data protection and privacy, we support businesses in aligning with Turkish data protection law (KVKK) and GDPR-equivalent standards. This includes drafting and implementing privacy policies, data processing agreements, and employee data protocols. We also advise on cross-border data transfers, explicit consent management, and responding to personal data breach incidents or inspections by the Turkish Data Protection Authority.
Bankruptcy & Debt
At Develioglu & Dag, our Financial Restructuring practice provides comprehensive legal and strategic solutions to businesses navigating financial distress, liquidity challenges, or complex debt obligations. Financial restructuring is a critical process for companies seeking to stabilize their operations, avoid insolvency, and achieve long-term sustainability through the renegotiation of liabilities, optimization of capital structures, and strategic asset realignment.
Our expertise encompasses debt restructuring, where we assist clients in negotiating with creditors for maturity extensions, interest rate reductions, or principal forgiveness, while ensuring compliance with Turkish insolvency laws, including the Execution and Bankruptcy Law (İİK) and specialized mechanisms such as composition agreements (concordatum). We also advise on operational and business model restructuring, conducting in-depth financial analyses to improve cash flow management, balance sheet health, and profitability. This may involve asset divestments, mergers and acquisitions (M&A), or joint venture restructuring to enhance viability.
In contentious scenarios, our team represents clients in dispute resolution, including litigation and arbitration, to protect their interests in creditor negotiations or insolvency proceedings. Additionally, we ensure regulatory alignment with BDDK (Banking Regulation and Supervision Agency), SPK (Capital Markets Board), and TCMB (Central Bank of the Republic of Turkey) frameworks, particularly for cross-border transactions involving international investors and double taxation treaties.
Financial restructuring demands a multidisciplinary approach, blending legal acumen with financial strategy. Develioğlu & Dag delivers end-to-end advisory services—from risk assessment and contract restructuring to litigation support—helping businesses emerge stronger in volatile economic climates.
Employment & Labor
Develioglu & Dag offers comprehensive legal support across the full spectrum of employment and social security law, representing both domestic and multinational employers in all aspects of the employer-employee relationship.
We assist our clients in structuring compliant employment frameworks, drafting and negotiating individual and collective employment contracts, and developing workplace policies tailored to their industry-specific needs. Our team also provides strategic guidance on employee discipline, termination procedures, mass layoffs, and internal investigations—always with a view to minimizing litigation risk.
In the area of social security law, we advise on contributions, regulatory compliance, and disputes arising from occupational accidents, disability claims, and employment status classifications. Our lawyers regularly represent clients before the Turkish Labour Courts and the Social Security Institution (SGK).
We have notable expertise in managing the mediation phase of employment disputes—an essential step in Turkey’s legal process. Our recent track record includes successfully conducting over 80 mediations in a single year, achieving amicable settlements in most cases and significantly reducing our clients' exposure to litigation.
Our employment law practice is particularly active in industries with complex labour dynamics, such as manufacturing, logistics, and energy, where we provide sector-specific, strategic counsel for both day-to-day HR issues and major employment disputes.
Intellectual Property
At Develioglu & Dag, our Intellectual Property (IP) practice provides comprehensive legal services for the protection, enforcement, and commercialization of intangible assets, including trademarks, patents, designs, copyrights, and trade secrets. We advise local and international clients across a wide range of sectors on both contentious and non-contentious IP matters.
Our team offers strategic legal support in the registration and prosecution of IP rights, portfolio management, licensing arrangements, and due diligence in corporate transactions. In contentious cases, we represent clients in infringement claims, unfair competition disputes, domain name conflicts, and cancellation and opposition proceedings before Turkish civil and administrative courts, as well as the Turkish Patent and Trademark Office.
We also handle complex litigation arising from misuse of confidential information, employee breaches of IP obligations, and parallel importation issues. Our deep understanding of both local and cross-border IP enforcement mechanisms allows us to act swiftly and effectively to protect our clients’ innovations and brand value.
Real Estate
Develioglu & Dag offers comprehensive legal services in property law to both domestic and international clients. Their expertise encompasses advising on the purchase and sale of movable and immovable property, transferring co-ownership shares, establishing real rights, and setting up easements. The firm also assists in drafting and reviewing contracts related to limited rights in rem, converting joint ownership into joint ownership shares, and handling disputes concerning ownership rights, claims for surrender, and land registry entries. Their services are tailored to meet the specific needs of each client, ensuring thorough legal support in all property-related matters.
Our Partners and Associates

Sarp Dağ is a seasoned legal professional with expertise in corporate law and banking & finance. His practice focuses on advising domestic and international clients on complex transactions, corporate governance, and regulatory compliance. With a strategic approach to negotiation and risk management, he has successfully represented clients across various industries, including finance, energy, and technology.
With 15 years of experience, Sarp combines rigorous legal analysis with practical business insights to deliver tailored solutions. His multilingual proficiency and deep understanding of cross-border transactions make him a trusted advisor for multinational corporations and investors operating in Turkey.

Dr. Üner Dag brings exceptional legal expertise and academic rigor to his practice as a senior partner at Develioglu & Dag. With a distinguished background that combines scholarly achievement with practical legal experience, Dr. Dag specializes in complex areas of commercial law with particular focus on international transactions and regulatory compliance matters.
Holding a doctoral degree in law, Dr. Dag offers clients a unique combination of deep theoretical knowledge and practical problem-solving skills. His practice encompasses advising both domestic and international clients on sophisticated legal matters, where his analytical approach and attention to detail prove invaluable in navigating Turkey's dynamic legal environment.
As an integral part of the firm's leadership, Dr. Dag contributes significantly to the firm's reputation for excellence, particularly in handling high-stakes matters that require both technical legal mastery and strategic business acumen. His multilingual capabilities and understanding of cross-border legal frameworks enable him to effectively serve clients with international operations and interests.
Committed to advancing legal scholarship alongside his practice, Dr. Dag maintains an active role in legal academia, ensuring his counsel reflects both current legal standards and emerging developments in the field. His approach consistently delivers tailored solutions that address clients' immediate needs while anticipating future legal challenges.
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