Meet Gabriel Perez, a heating, ventilation and air conditioning equipment specialist with the Air Force Civil Engineer Center’s Operations Directorate. Perez and his coworkers on AFCEC’s Civil Engineer Maintenance Inspection and Repair Team evaluate and recommission the mechanical systems providing HVAC to Air Force and Space Force facilities worldwide. It includes testing air and water flows and the systems controlling the various pieces of equipment. (U.S. Air Force graphic illustration)