CALGARY, Alberta, Oct. 31, 2023 (GLOBE NEWSWIRE) Gran Tierra Energy Inc. ("Gran Tierra" or the "Company") (NYSE American:GTE)(TSX:GTE)(LSE:GTE) is pleased to announce the appointment of Mr. Sebastien Morin as Chief Operating Officer (“COO”). Mr. Morin will be joining Gran Tierra as COO, located in Calgary and will report to Gary Guidry, President and Chief Executive Officer. Mr. Morin was most recently President & COO at WesternZagros Resources Ltd., a privately-owned petroleum operating comp