CALGARY, ALBERTA--(Marketwired - June 24, 2016) - Gran Tierra Energy Inc. ("Gran Tierra") (NYSE MKT:GTE)(TSX:GTE), today announced the promotion of four key team members to executive officers effective immediately.

Ed Caldwell - Vice President Health, Safety and Environment & Corporate Social Responsibility

Ed Caldwell had a distinguished 27-year career with ExxonMobil and Imperial Oil, and most recently worked with Caracal Energy Inc. in Caracal's efforts and achievement in Chad. Mr. Caldwell has extensive experience in senior Regulatory Approvals and HSE Management roles in Canada, Asia, Russia, and Africa. He has also worked with the Government of Canada and, in that capacity, represented Canada at the OECD Energy/Environment Committee as well as at the Intergovernmental Panel on Climate Change. Mr. Caldwell will work with Gran Tierra's executive and operations team to lead the implementation of corporate policies and programs related to HSE & CSR. Mr. Caldwell will also assist with government and stakeholder relations in Gran Tierra's countries of operation.

Susan Mawdsley - Vice President Finance and Corporate Controller

Susan Mawdsley is a Chartered Accountant with 25 years of experience in the oil and gas industry. She has been the Corporate Controller of Gran Tierra Energy since 2012 and has direct responsibility for the finance departments in all business units, as well as treasury and internal audit. Prior to joining Gran Tierra in 2011, she was an independent consultant providing contract controller, CFO, and other finance related services to publicly traded domestic and international oil and gas companies.

Glen Mah - Vice President Business Development

Glen Mah is a Petroleum Geologist with extensive management experience covering the execution of exploration programs, field development and asset management for conventional and unconventional hydrocarbons. He has worked with onshore and offshore projects in international basins in the Americas, Africa, Middle East and Asian. Glen was the Chief Geologist with the highly successful Tanganyika Oil Company Ltd. project in Syria. Mr. Mah will lead and coordinate all of the Company's new business development efforts. He will continue to work closely with the executive leadership team to ensure the Company focuses its valuable manpower resources on opportunities consistent with the corporate strategy, and material to shareholder value creation.

Rodger Trimble - Vice President Investor Relations

Rodger Trimble is a professional oil and gas Engineer with 30+ years of experience in domestic and international basins in various management positions. Prior to joining Gran Tierra, Mr. Trimble was Head of Corporate Planning, Budgeting & Finance with Glencore E&P Canada Inc. and prior thereto Director Corporate Planning, Budget & Business Development with Caracal Energy Inc. (acquired by Glencore E&P). He has held several senior management positions ranging from Country Manager in Argentina with Canadian Hunter Exploration, Vice President, Exploitation with Esprit Energy Trust, Manager, Reservoir Engineering with Apache Canada Inc. and Manager, Upstream Evaluations - Frontiers & International with Husky Energy. 

Gary Guidry, President and CEO of Gran Tierra, said "Ed, Susan, Glen and Rodger are all key members of the leadership team at Gran Tierra. Their broad experience and continued leadership will help steer Gran Tierra as we execute our strategy to create value for all stakeholders".

About Gran Tierra Energy Inc.

Gran Tierra Energy Inc. together with its subsidiaries is an independent international energy company focused on oil and natural gas exploration and production in Colombia. The Company also has business activities in Peru and Brazil.

Gran Tierra's Securities and Exchange Commission filings are available on a web site maintained by the Securities and Exchange Commission at http://www.sec.gov and on SEDAR at http://www.sedar.com.