TEGOS (Formerly TGS Baltic) is home to an active projects and energy team, providing end-to-end support throughout all phases of the project. The firm’s clients operate predominantly in the public sector, and it has been involved in several pivotal projects in the Baltics, such as helping a major client adjust to the new environment in the aftermath of the region’s electricity synchronisation with continental Europe. The team is led by three established practitioners, Paulius Zapolskis, Karolis Smaliukas and Dainius Stasiulis, and aided by managing partner Vilius Bernatonis.
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Phone
+370 5 251 4444
Email
Profile

Profile

Work Department
Practices: Litigation & Dispute Resolution / Energy & Infrastructure / Banking & Financial Services / Regulatory & Competition / Corporate & Commercial. Industries: Energy & Natural Resources / Financial Services
Position

FCIArb Vilius Bernatonis is the Managing Partner and Chair of the Baltic Board, with over 25 years of legal experience across banking and finance, energy, international arbitration, and corporate law.

Widely recognised as a leading legal expert in the region, Vilius advises major local and international financial institutions, as well as companies of national strategic importance. He regularly acts as both arbitrator and counsel in complex, high-value international disputes, bringing deep legal insight and sound strategic judgement to each case.

Beyond his legal practice, Vilius is a respected public voice on banking, finance, and economic policy. He is frequently invited to speak or moderate at high-level conferences, industry forums, and policy events, where he shares insights on financial regulation, market trends, and economic developments in Lithuania and the wider region. His ability to engage a broad range of audiences – from business leaders and policymakers to legal professionals – makes him a sought-after contributor to public discourse.

Vilius also plays an active role in the American Chamber of Commerce in Lithuania, contributing to the improvement of the business environment and promoting transatlantic economic cooperation. He participates in social impact initiatives and in leadership networks such as the Vilnius Executive Club and family-focused educational organisations.

Languages
Lithuanian, English, Russian
Memberships
Vice-Chairman, American Chamber of Commerce Fellow of The Chartered Institute of Arbitrators, Head of the Baltic States Chapter Correspondent of The International Arbitration Institute Lithuanian Bar Association International Bar Association

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Testimonials

Collated independently by Legal 500 research team.

  • ‘This practice stands out for combining deep legal expertise with a practical, business-focused mindset. The lawyers are highly responsive, often available beyond standard working hours, and their advice is always clear and solution-oriented. What makes them different is the genuine attention they give to our needs — we feel treated as a priority client with tailored support. Their transparency on costs and modern, efficient ways of working make the cooperation both smooth and reliable.’

    ‘Dr. Ieva Povilaitienė is a remarkable professional who combines accuracy with accessibility. She is always willing to assist, even on short notice, and consistently delivers advice that is both precise and practical for business decisions. Her dedication and ability to simplify complex matters make her stand out from competitors. We greatly value her commitment and the confidence she brings to every situation — when I think about legal support, my first thought is simply to call Ieva.’

    ‘Listened to our requests, flexible on delivery timelines, understood our assignment really well, delivered on agreed deadlines.’

    ‘Dalia Tamašauskaitė-Žilienė is a real expert, a pleasure to work with.’

    ‘Deep understanding of the renewable field in terms of relevant local laws & regulations, always willing to find innovative solutions and engage with dialogue with governmental entities on our behalf.’

    ‘Augustinas Razumas specifically demonstrates immense regulatory knowledge on energy, goes to great lengths to strike deals with governmental entities.’

    ‘They are expert legal "translators" who can distil intricate regulatory legal terms into understandable, actionable business advice. The combination of deep expertise and an easy-going, approachable manner helps to foster strong, long-term personal relationships, making the difficult parts of business much smoother to navigate.’

    'Perfectly working team covering many issues related to energy sector.' 

Key clients

  • Litgrid AB The Ministry of Energy Nala Renewables Limited AB Amber Grid UAB A-Geoinvest Miesto gijos (previously AB Vilniaus silumos tinklai) UAB EPSO-G KN Energies, AB Enefit Green, UAB BaltCap

Work highlights

Advised the Lithuanian state-owned energy company, UAB EPSO-G, on investing in Rheinmetall Defence Lietuva, UAB.