Gran Tierra Energy Announces Change in Directors

CALGARY, Alberta, March 31 /PRNewswire-FirstCall/ -- Gran Tierra Energy
Inc. (TSX: GTE; OTC Bulletin Board: GTRE), a company focused on oil
exploration and production in South America, today announced that Nadine Smith
has resigned from the Board of Directors effective March 27, 2008. Ms. Smith
recently became the Chair of the Board of Directors of La Cortez Energy, Inc.,
where she will need to devote her time and efforts.
Nick Kirton, FCA, ICD.D has joined the Board of Directors of Gran Tierra
Energy effective March 27, 2008, and will also assume the role of Chairman of
the Audit Committee. Mr. Kirton is a Chartered Accountant and retired after a
thirty-eight year career at KPMG. He currently sits on the boards of
directors of four public companies and one private company. In addition, he
is also a member of the Board of Governors of the University of Calgary and is
a member of the Education and Qualifications Committee of the Canadian
Institute of Chartered Accountants.
Dana Coffield, President and Chief Executive Officer of Gran Tierra Energy
Inc., stated, "The Board of Directors wishes to thank Ms. Smith for her past
contribution to the Board of Gran Tierra Energy and wish her success in her
new endeavor. We look forward to having the experience and skills of Mr.
Kirton as we continue to grow our international oil and gas company."
About Gran Tierra Energy Inc.:
Gran Tierra Energy Inc. is an international oil and gas exploration and
production company operating in South America, headquartered in Calgary,
Canada, incorporated in the United States, and trading on the Toronto Stock
Exchange (GTE) and the OTC Bulletin Board (GTRE). The company holds interests
in producing and prospective properties in Argentina, Colombia and Peru. The
company has a strategy that focuses on establishing a portfolio of producing
properties, plus production enhancement and exploration opportunities to
provide a base for future growth. Additional information concerning Gran
Tierra Energy is available at http://www.grantierra.com. Investor inquiries
may be directed to info@grantierra.com or 1-800-916-GTRE (4873).
SOURCE Gran Tierra Energy Inc.

Dana Coffield, President & Chief Executive Officer of Gran Tierra Energy,
Inc., 1-800-916-4873, info@grantierra.com; or Al Palombo, Investor Relations
of Cameron Associates, +1-212-245-8800, Ext. 209, al@cameronassoc.com, for
Gran Tierra Energy Inc.