Arizona Army National Guard on Instagram: "MOS Spotlight: 91C / Utilities Equipment Repairer 91Cs are the Army’s HVAC and utilities experts, responsible for keeping critical systems running in any environment. They maintain and repair heating, ventilation, air conditioning, plumbing, and power-generation equipment that supports barracks, command posts, and field operations. Their work directly impacts mission readiness by ensuring Soldiers have safe, functional, and reliable facilities. These sk