Stem Holdings, Inc. announce the appointment of Charles A. Gargano, a business leader, former government official and former U.S. Ambassador to Trinidad and Tobago, to Stem’s Advisory Committee. Prior to public service, Gargano worked in the private sector. Mr. Gargano was Vice President of J.D. Posillico Engineering and Construction on Long Island. His leadership in the Long Island business community garnered him a host of appointments on boards and committees in both the corporate and not-for-profit sectors.