Gran Tierra Energy has appointed Sebastien Morin as Chief Operating Officer (COO). Morin was most recently President and COO at WesternZagros Resources. Prior to his original tenure with Gran Tierra, Morin spent 13 years with Imperial Oil (Esso) and ExxonMobil, where he held increasingly more senior technical and managerial positions in upstream and downstream, including drilling and completions, reservoir development, production, customer service and distribution, mostly onshore but also with experience offshore in the Gulf of Mexico.