HERDEM Attorneys at Law is a leading İstanbul-based full-service law firm founded in 2011, renowned for advising on high-stakes project finance, complex corporate and commercial transactions, regulatory compliance, and cross-border investments. The firm acts as a trusted legal partner to multinational corporations, financial institutions, sponsors, and government entities operating across strategic sectors.

We provide legal solutions that combine advanced technical understanding with strategic business insight. Our multidisciplinary team integrates legal, financial, and sector-specific expertise to guide clients through every stage of sophisticated projects—structuring, negotiating, securing regulatory approvals, and managing risk under Türkiye’s evolving legal framework.

HERDEM is recognized for its leadership in project finance, mergers and acquisitions, joint ventures, and project development. The firm also has a strong record in navigating clients through complex regulatory regimes involving defense procurement, technology transfer, export controls, and offset frameworks.

As a firm, we are committed to collaboration and partnership—captured in our philosophy, “To Respond Together.” Our partner-led approach ensures that clients receive strategic counsel and forward-looking solutions designed to achieve measurable business outcomes.

Our culture fosters agility, efficiency, and innovation. We emphasize proactive problem-solving, lean team structures, and integrated project management to deliver timely, effective, and commercially aligned results.

HERDEM has advised on transactions exceeding USD 1.19 billion, guiding clients in syndicated financings, procurement frameworks, project structuring, and complex M&A. The firm’s experience spans defense, energy, infrastructure, aviation, technology, and finance, advising entities such as Leonardo, Thyssenkrupp, Allison Transmission, and MNG Airlines.

The firm’s excellence has been recognized by Chambers and Partners Europe 2025 for Aviation & Strategic Industries and by Legal 500 EMEA 2025 as a Firm to Watch. HERDEM has also been selected as a DIANA NATO Mentor for advising on defense and dual-use technology programs.

HERDEM maintains active memberships in international and domestic organizations, including the International Bar Association (IBA), American Bar Association (ABA), Corporate Governance Association of Türkiye (TKYD), and the Turkish Business People’s Association (TÜSİAD).

Corporate Social Responsibility

HERDEM is deeply committed to advancing compliance culture, social impact, and inclusive development in Türkiye. The firm established the Turkish Trade & Sanctions Network (TTCSN), the largest compliance and trade sanctions network in the country, bringing together legal and industry professionals to strengthen national and international compliance standards and enhance Türkiye’s global trade alignment.

HERDEM actively supports community-focused initiatives that promote education, inclusion, and accessibility. Through its Charity Support Project, the firm contributes to Ahtapot Gönüllüleri under the motto “Do not complain, take action.” HERDEM also funded the construction of a movie theater designed specifically for individuals with disabilities, ensuring equal access to cultural experiences.

In collaboration with Türkiye Genç İş İnsanları Derneği (TÜGİAD), HERDEM proudly supports the construction of a new school to provide education and opportunity for future generations. This initiative reflects the firm’s belief that investing in education is investing in the future and underscores its ongoing commitment to creating lasting social value through meaningful action.