A Union Engineer is a skilled professional who operates, maintains, and repairs mechanical systems—such as heating, ventilation, air conditioning (HVAC), and elevators—in buildings or facilities, and who is a member of a labor union. Union Engineers typically work under collective bargaining agreements that provide benefits like job security, standardized wages, and workplace protections. Their responsibilities often include troubleshooting equipment, performing preventative maintenance, and ensuring systems comply with safety regulations. Union Engineers may also participate in union meetings and training programs to stay updated on industry standards.