Department profile
Kambourov & Partners

Energy

Europe Guide 2026 : Bulgaria


Kambourov & Partners

Rankings

About

Provided by Kambourov & Partners

The department has a long-standing track record and is widely renowned among local and international energy market players for its involvement in landmark projects over the past two decades. The team provides integrated advisory and litigation services across all aspects of the energy sector, including:

• EU Green Deal and clean energy transition

• Electricity generation – renewables, conventional, and nuclear

• Smart electricity grids

• Electricity transmission, distribution, supply, and storage

• Electricity trading (including cross-border)

• Natural gas – exploration, extraction, transmission, and distribution

• Mining, fuels, and alternative fuels

• Energy efficiency and electric vehicles

• Regulatory regimes and project finance

• Litigation

The team handles legal, licensing, and tax matters in energy investments, with a focus on renewable energy sources, electricity and gas infrastructure, and alternative fuels. It advises on energy regulatory issues, including licensing, pricing, approvals for M&As, post-acquisition restructurings, financing, and planning for new builds (including nuclear power plants).

The department is actively engaged in advising projects financed under the EU Recovery and Resilience Facility, aimed at the green transition of the economy. It represents clients before Bulgarian courts, regulatory bodies, ministries.

The team is deeply involved in renewable energy projects, hydrogen storage facilities, and natural gas market development in Bulgaria.

Industries (7)

  • Electricity
  • Gas
  • Nuclear
  • Mining
  • Renewables
  • Natural Resources
  • Fuels

Chambers Review

Provided by Chambers

Energy - Bulgaria

Band 1

Band 1


What the Team is Known For
Kambourov & Partners fields a well-reputed energy practice offering noteworthy experience in regulatory matters. The team stands out for significant activity in the electricity sector, with a strong client portfolio that consists of major domestic and international electricity trading companies. The group also regularly assists with energy-related contentious matters. The firm is also well equipped to advise on transactional energy mandates, including post-acquisition restructurings.

Strengths

Provided by Chambers

  • Kambourov & Partners possess a very deep knowledge of Bulgarian regulations and government structures.

    Energy respondentEurope
  • They combine unmatched regulatory expertise with strong transactional capabilities.

    Energy respondentEurope

Notable Practitioners

Provided by Chambers

  • Band 1Stefan Tzakov
    Band 1Stefan Tzakov

    Stefan Tzakov

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

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

      Energy respondentEurope
  • Band 2Irena Petkova
    Band 2Irena Petkova

    Irena Petkova

    Irena Petkova advises a range of international clients on the regulatory aspects of their Bulgarian energy interests as well as on entry into the market.
    • Irena provides strong expertise in Bulgarian energy regulation, clear and solution-oriented advice and consistent responsiveness.

      Energy respondentEurope
    • Irena Petkova is an exceptional professional with deep expertise in energy regulation and strong experience in supporting transactional work within the sector.

      Energy respondentEurope

Ranked Individuals at Kambourov & Partners (2)

Bulgaria

Members

Provided by Kambourov & Partners

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