LAWYER PROFILE

Stefan Tzakov

Europe 2026

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Ranked in 2 practice areas

About

Provided by Kambourov & Partners

Practice Areas

Energy

Career

Stefan Tzakov leads the firm's Energy practice and has over 20 years of experience advising on all aspects of the energy sector, including nuclear, electricity generation (conventional and renewable), gas, mining, fuels, electricity distribution and supply, energy trading, regulatory matters, and project finance. He is widely recognised as one of the leading energy lawyers in Bulgaria, with a strong track record in litigation and regulatory matters.

Stefan’s extensive experience includes advising on key energy projects, such as the privatisation of Bulgaria’s electricity distribution companies, thermal power plants, and heating power plants (2004-2006), as well as significant work on the Belene nuclear power plant project (2007-2009, 2011, and its renewal in 2019). He also acted as lead counsel for E.ON throughout its operations in Bulgaria (2004-2014), supporting the company in regulatory, litigation, and transaction matters, including the sale of its Bulgarian business to Energo-Pro in 2012.

Among his recent work highlights is advising on the Kozloduy NPP – New Build project, focusing on energy and nuclear law, regulatory, environmental, construction, public procurement, and contractual issues. He has also been involved in major gas pipeline projects in Bulgaria, including Nabucco, Shah Deniz, South Stream, and TurkStream.

In recent years, Stefan has led the firm’s work on high-profile energy and infrastructure transactions, including advising on renewable energy projects and acquisitions of wind and solar assets.

Stefan also focuses on competition law and provides expert advice and court representation on unfair competition matters, dominance, cartels, dawn raids, pricing, refusal to supply and others.

Chambers Review

Provided by Chambers

Chambers European Guide

Energy - Bulgaria

Band 1
Band 1

Individual Editorial
Stefan Tzakov is active on a range of contentious mandates, including gas pipeline-related disputes and litigation proceedings concerning energy trading. He also advises on energy regulatory issues.

Competition/Antitrust - Bulgaria

Band 2
Band 2

Individual Editorial

Stefan Tzakov represents clients in investigations into possible cartels. He also assists clients with competition law compliance, including in relation to distribution agreements. He has a number of clients from the FMCG sector.

Strengths

Provided by Chambers

  • Stefan has strong expertise in Bulgarian energy regulation, offering clear and solution-oriented advice and consistent responsiveness.

    EnergyChambers European Guide
  • Stefan Tzakov is a very responsive and knowledgeable lawyer. He quickly builds a relationship of trust with his clients.

    EnergyChambers European Guide
  • What sets him apart is not just his command of the law, but the clarity and calm authority with which he advises - always thoughtful, strategic and attuned to the broader implications of every issue.

    Competition/AntitrustChambers European Guide

Ranked Individuals at Kambourov & Partners (15)

Bulgaria

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