Colin Johnson (Director)

Colin acts as an expert witness on international arbitrations and as a sector expert on energy related work across the firm.

He leads the Energy Community of Interest for Grant Thornton International.

He is also the Chairman of TheCityUK's Brazil and Latin America Committees.

Colin's career has focused principally on investment in the energy and infrastructure sector, often in emerging markets and from a private equity point of view. He first got involved in the power sector in 1990. A large part of his time has been spent living and working in Latin America but he also has extensive experience in India and has dealt with projects across five continents.

He has specific expertise in relation to the project investment cycle, particularly for large scale projects in the energy sector. He has acted on behalf of national governments, large corporate companies and entrepreneurs in international arbitrations and litigation ranging up to US$6bn in size. He has also acted in large scale investigations (eg the UK company for Madoff) on behalf of parties such as a regulatory agency and company liquidators including using his language capabilities to track down specific information and links not otherwise available.

Given his experience in the energy sector and geographic focus he has also been called upon to give advice for large international companies, private equity investors, pension funds and others in relation to due diligence, valuation, listing and strategy issues.

Colin's expertise covers:

  • acting as expert witness in commercial and contractual disputes, particularly international arbitrations
  • business plan evaluations and business valuations in the energy sector
  • due diligence
  • shareholder disputes
  • investigations into fraud and other investigations


  • Spanish (fluent)
  • Portuguese (intermediate)
  • German (basic)
  • Italian (good understanding)

Contact Details >

Colin Johnson

London, Finsbury Square

+44 (0)207 728 2103