Collectively, Gran Tierra Energy's management team has over one hundred years of hands-on international exploration and production operations experience and success.

Jeffrey Scott  - Executive Chairman


Duncan Nightingale -Interim President & Chief Operating Officer

Duncan has 30 years of corporate head office and resident in-country international operating experience. His experience spans all aspects of managing exploration programs, development and production operations, new business ventures, portfolio management and strategic planning. He has worked in many countries and hydrocarbon provinces including Latin America, Middle East and Far East, C.I.S, North Sea, Eastern Europe, Australasia, North, East and West Africa. Duncan has a proven track record of reserves additions and the ability to create and manage highly efficient and successful multi-disciplinary teams.

Duncan commenced his E&P career with Britoil (now B.P.), in 1981, before progressing his international career with Arco International. Subsequently held a range of senior management positions in Artumas Group, Dana Gas in the United Arab Emirates, EnCana and Nexen Inc. Duncan graduated from the University of Nottingham in the U.K. with a Bachelor of Science degree with honors in Geology.

James Rozon - Chief Financial Officer

On May 2, 2012, Mr. Rozon was appointed Chief Financial Officer of Gran Tierra Energy. Mr. Rozon has served as Gran Tierra’s Corporate Controller from October 1, 2007 to December 2011. He has previous experience in accounting, finance and administration in the petroleum and technology industries in Canada. During his career, his responsibilities have included management of finance related activities of Canadian and American oil and gas exploration and production companies operating in Canada and the United States of America and a software development company operating in Canada, the United States, China and Sweden. He was Controller of Sound Energy Trust, a publicly listed Canadian oil and gas trust from July 2006 to September 2007, at which time it was sold. From October 2002 to June 2006, and previously from July 1995 to February 1998, he was the Corporate Controller of Zi Corporation, a Canadian software development company publicly listed in both Canada and the United States of America. From June 2000 to September 2002, he was the Controller for Energy Exploration Technologies, an American publicly listed oil and gas exploration company operating in Canada and the United States. From April 1998 to May 2000, he was the Manager, Financial Reporting of Summit Resources Limited, a publicly listed Canadian oil and gas exploration and development company with operations in Canada and the United States of America. From June 1990 to June 1995, Mr. Rozon worked in public practice for five years for Deloitte & Touche LLP including one year as an audit manager in the Oil and Gas group in the Calgary, Alberta office. Mr. Rozon holds a Bachelor of Commerce degree from the University of Saskatchewan and is a member of the Institute of Chartered Accountants of Alberta and the Institute of Chartered Accountants of Saskatchewan 

David Hardy - General Counsel, VP Legal and Secretary

David has more than 20 years experience in the legal profession. Before joining Gran Tierra Energy in March 2010, he worked for EnCana Corporation for 9 years and held various positions, including: Vice President Divisional Legal Services, Integrated Oil and Canadian Plains Divisions; Vice President Regulatory Services, Corporate Relations Division; and Associate General Counsel, Offshore and International Division. For 4 of his 8 years in the Offshore and International Division of EnCana, Mr. Hardy led the Legal and Commercial Negotiations Group. He has experience in new ventures, dispositions and operations in various countries, including Australia, Brazil, Chad, Libya, Oman, Qatar and Yemen. Prior to his time at EnCana, Mr. Hardy spent over 10 years in private practice and was a partner in a law firm in Calgary, Alberta. He holds a Juris Doctor Degree from the University of Calgary (converted from an LLB Degree in 2011) and is a member of the Law Society of Alberta and the Association of International Petroleum Negotiators.

Adrian Coral - President, Gran Tierra Energy Colombia

Mr. Adrian Coral is a professional Petroleum Engineer with a total of 18 years of experience in the oil and gas industry. Mr. Coral joined Gran Tierra Energy in 2006 as an operations engineer in Gran Tierra Energy Colombia, and was promoted to Senior Operations Manager of Gran Tierra Energy Colombia in 2013. Mr. Coral graduated from the Universidad de América - Bogotá D.C. with a degree in Petroleum Engineering and from the School of Business Management - Bogotá D.C with a degree in Project Management.

Leandro Cunha, General Manager, Gran Tierra Energy Brazil

Leandro Cunha is a native Brazilian and has over twenty years of experience working for international companies in Brazil. Prior to joining Gran Tierra Energy Inc., Leandro was Head of Finance for Maersk Oil Brazil Ltda., Controller for FMC Technologies do Brasil Ltda and Finance Director for CHC Helicopter in Brazil. Leandro participated in SK do Brasil Ltda`s acquisition in amount of USD 2.4 Billion, acting on paralegal / statutory, cash, tax planning and assets integration on Maersk’s portfolio. Leandro led Management of Change project (Finance and IT) in Angola and supported Global Standard Operating Procedures implementation in Maersk Oil. Leandro also supported the startup of CHC Helicopter in Brazil. Previous to that, Leandro worked for Baker Hughes as Controller and was Auditor in Deloitte and EY, in Brazil. Leandro is member of Rio de Janeiro Regional Accounting Council (CRC-RJ), Brazilian Accountants Institute (IBRACON), Brazilian Petroleum Institute (IBP) and Brazilian Institute of Corporate Governance (IBGC). Leandro has Bachelor’s Degree in Accounting from Universidade Federal do Rio de Janeiro (UFRJ), Master’s Degree in Strategic Management of Companies (Lato Sensu) from Universidade Cândido Mendes (UCAM), Executive MBA / Financial Master’s Degree (Corporate Finance) from IBMEC Business School and completed the Western Ontario’s Management Program.

Carlos Monges – President, Gran Tierra Energy Peru

Carlos is Peruvian and has over 30 years experience in the oil industry. He joined Gran Tierra upon its acquisition of Petrolifera Petroleum Limited in March 2011. He was Petrolifera’s country manager in Peru since 2005, with responsibility for management and exploratory operations in three onshore blocks. Carlos has extensive knowledge of the geology of Peru. He was the senior geologist on the team that performed for Perupetro a geological and geophysical assessment of Peru’s hydrocarbon basins which was sponsored by the Canadian and Peruvian governments. Prior to that, Carlos was the Operations Manager for Energy Development, Anadarko Petroleum and then BPZ Energy with respect to various offshore and onshore blocks in Peru. He began his career in the industry working as a field development geologist and a well-site and production geologist in Talara basin for Petroperu and Occidental Petroleum and also worked as a mud engineer in drilling operations in Venezuela and Argentina. Carlos received his Bachelor of Science Degree in Geological Engineering from Universidad Nacional Mayor de San Marcos, Lima in 1978, performed studies on exploration techniques at Robertson Research Center in United Kingdom in 1990, and completed certificate studies on oil industry management at the IHRDC program in Boston, USA in 1997. He is a current member and past director of the Peruvian Geological Society.