SAN ANTONIO – The U.S. Army Environmental Command welcomed a new commander during a change of command ceremony here July 10 at the Fort Sam Houston Theatre.Col. Isaac C. Manigault relinquished command to Col. Alicia M. Masson.The ceremony and passing of the command’s colors was presided over by Lt. Gen. Douglas M. Gabram, commanding general of Installation Management Command.Since 2018, Manigault has lead the command’s team in their efforts to ensure training lands remain available for Army use, help installation commander’s around the world reduce the environmental impact of Army operations and ensure installation staffs comply with the countless state and federal environmental laws and regulations, according to Gabram.“At each installation in the world, USAEC’s team of professionals is making a difference every day. Helping commanders and staff with everything from clean drinking water to pest management, Ike’s team of scientists affect almost every aspect of installation life and Army operations,” said Gabram.Manigault goes on to serve in the Army’s Office of the Inspector General.Masson last served as a branch chief at U.S. Army Human Resources Command.“Col. Allie Masson… brings with her a wealth of experience from multiple deployments to Iraq and Afghanistan, and the challenging assignment as commander of Radford Army Ammunition Plant,” said Gabram. “Without a doubt, her perspective will serve her well as the commander of Army Environmental Command.”Masson becomes the 22nd in a long line of leaders stretching back to 1972 when the unit was originally stood up as the Program Manager for Demilitarization of Chemical Materiel to destroy the nation's stockpile of toxic chemical agents and munitions.