Doyuk & Co is an independent London-based legal and strategic advisory practice operating at the intersection of corporate structuring, cross-border investment, and international mobility. Founded by Tuna Yasin Doyuk — a multi-jurisdictional solicitor qualified across England & Wales, Northern Ireland, the Republic of Ireland, and Turkiye — the firm provides senior-level counsel defined by discretion, rigorous execution, and clear commercial judgment.
We act as trusted legal counsel to venture capital funds, high-growth technology enterprises, and multinational groups scaling into the United Kingdom. Our practice structures cross-border investment rounds, establishes resilient corporate governance and employment frameworks, and manages regulatory compliance, including UK GDPR data protection. Drawing on extensive experience heading multi-jurisdictional legal operations as former General Counsel, we combine boardroom-level risk management with agile commercial delivery.
Beyond corporate advisory, we provide specialised counsel to pioneering founders, international executives, and exceptional leaders seeking to enter the UK market and relocate under relevant immigration frameworks. As an authorised legal service provider regulated by the Immigration Advice Authority (IAA Registration No: F202100307), we offer end-to-end strategic mobility solutions with complete institutional integrity.
In data governance, we act as outsourced Data Protection Officers (DPO) and strategic UK GDPR counsel to international enterprises managing cross-border data flows.
Doyuk & Co is proud to be listed as an approved legal service provider by the UK Government’s Department for Business and Trade (DBT) and featured on the British Consular list of English-speaking lawyers by the Foreign, Commonwealth & Development Office (FCDO).
Tuna is the founder and Managing Director of Doyuk & Co. Over a 17-year international legal career, he has served as trusted counsel to venture capital funds, high-growth technology enterprises, and multinational corporate groups, advising on corporate structuring, cross-border transactions, and strategic market expansion.
Prior to founding the firm, Tuna led multidisciplinary corporate legal operations as an international General Counsel. His strategic governance, transactional oversight, and approach to enterprise risk earned consecutive rankings in the Legal 500 GC Powerlist. Today, he brings this boardroom perspective directly to founders, investment committees, and corporate leadership teams scaling their operations within the United Kingdom.
As a multi-jurisdictional solicitor admitted across the UK, Ireland, and Turkiye, Tuna offers distinctive cross-border capability. His practice seamlessly integrates UK corporate governance, commercial contracts, employment frameworks, and UK GDPR data compliance with strategic business mobility and Global Talent pathways. He combines private practice rigour with practical commercial judgment, advising clients who require absolute discretion and precision.
Professional Admissions & Credentials
Honours & Distinctions
The Legal 500: Individually ranked in The Legal 500 GC Powerlist for two consecutive years as a leading corporate legal counsel.
Senol is a multidisciplinary corporate mobility lawyer and legal operations director who leads the firm’s business immigration and corporate compliance practice.
Regulated by the Immigration Advice Authority (IAA) and a member of Immigration Law Practitioners’ Association (ILPA), he specialises in sponsor licence acquisition, compliance audits, skilled worker allocations, and strategic corporate mobility frameworks under the UK Immigration Rules. He acts as trusted counsel to high-growth technology enterprises, international groups, and large multinational employers, advising their boards and HR leadership on complex workforce compliance, risk mitigation, and continuous sponsor licence governance.
In addition to his client-facing practice, Senol oversees the firm’s executive management and business operations. He is responsible for establishing rigorous institutional standards, workflow governance, and cross-border delivery across Doyuk & Co’s operating jurisdictions.
Professional Memberships & Regulatory Status
Practice Focus
Corporate Sponsor Licences, Skilled Worker Allocations, Strategic Business Mobility & Operational Governance
Bringing over two decades of corporate legal experience, Ülkü previously spent a decade as Senior Legal Counsel within one of Turkiye’s largest Fortune Global 500 industrial conglomerates. She has extensive expertise in strategic contract negotiations, high-value procurement frameworks, and regulatory compliance.
At Doyuk & Co, she leads our corporate retainer advisory practice, providing ongoing counsel to growing businesses on contract lifecycle management, risk mitigation, and commercial governance.
Credentials
Qualified Lawyer in Turkiye
Practice Focus
Cross-Border Commercial Contracts, Corporate Retainers & Governance
Esra plays a key role in Doyuk & Co’s corporate and legal delivery practices, supporting casework execution across cross-border M&A transactions, corporate retainer advisory, and comprehensive immigration portfolios.
As an SRA-registered foreign lawyer and an experienced member of the Istanbul Bar, she bridges English and Turkish legal practice. In corporate practice, Esra actively assists clients with mergers and acquisitions (M&A), legal due diligence, commercial contracts, and transactional documentation.
Alongside her corporate work, she coordinates the delivery of both corporate mobility and private client immigration matters—ranging from sponsor licences, Global Talent pathways, and Skilled Worker applications to private client family reunification, spousal settlement, and high-net-worth visit visas.
Known for her thorough transactional support, rigorous case tracking, and proactive client coordination, Esra ensures reliable execution for international founders, corporate entities, and private individuals who are expanding into the United Kingdom or establishing their lives there.
Credentials & Professional Admissions
Practice Focus
Cross-Border M&A & Due Diligence Support, Corporate Retainer & Commercial Contracts, Business Mobility (Sponsor Licences & Work Routes), Private Client Immigration (Family Settlement & Visit Visas)
Goksu is a dual-qualified corporate lawyer and Solicitor of England & Wales, specialising in cross-border transactions, corporate governance, commercial contracts, and UK business immigration frameworks.
Prior to joining Doyuk & Co, Goksu practised at a leading Tier 1 international law firm, where she advised multinational corporations and global institutional investors on complex corporate transactions, legal due diligence, and capital markets mandates.
At Doyuk & Co, she supports high-growth ventures, corporate retainer clients, and international enterprises on corporate structuring, commercial documentation, and end-to-end UK mobility and immigration matters.
Credentials & Professional Admissions
Practice Focus
Corporate Governance & Commercial Contracts, Cross-Border Transactions & Legal Due Diligence, UK Business Immigration & Corporate Mobility, Employment Compliance & Workplace Governance
Ece works with Doyuk & Co’s Turkish Desk, advising Turkish and international clients on Turkish law matters, including litigation, dispute resolution, and corporate advisory work.
Her experience includes contentious and advisory work at established Turkish and international law firms in Istanbul, as well as supporting clients in the UK with contracts and Turkish law matters. She assists individuals and businesses with commercial and contractual disputes, medical malpractice claims, real estate matters, debt recovery, and corporate due diligence, bringing a cross-border perspective to matters involving Turkiye and the UK.
Credentials
Qualified Lawyer in Turkiye — Istanbul Bar Association
Practice Focus
Turkish Law & Cross-Border Disputes, Medical Malpractice Claims, Commercial & Contractual Matters, Corporate Advisory & Due Diligence, Real Estate & Debt Recovery
Hollie plays a key role within Doyuk & Co’s Sponsor Compliance team, advising employers and international organisations on sponsor duties, mock audits, and UK immigration compliance standards.
For over a decade, Hollie sat on the other side of the table—conducting on-site sponsor licence compliance visits and audit assessments for the Home Office to determine whether businesses met strict statutory criteria for sponsoring skilled workers. Today, alongside her independent practice, she consults with Doyuk & Co to assist corporate employers and scaling businesses with mock audits, HR systems readiness, and UKVI compliance risk mitigation.
Credentials
Immigration Consultant | Regulated by the Immigration Advice Authority (IAA No: P2334567)
Practice Focus
Sponsor Compliance & Immigration Delivery