HVAC & Generator Mechanic

At Terrestris, we leverage technology to create better mission outcomes through better human performance. We form strong client and team relationships through transparency and strive to create an environment where our team can let their excellence shine through. By finding, developing, and incorporating new ideas, we provide memorable services. Rooted in the USMC values of honor, courage, and commitment, Terrestris seeks to deliver extraordinary value to the American people by helping the Government become more efficient and effective.

The HVAC & Generator Mechanic will perform preventive maintenance, troubleshooting, and repair of HVAC systems and generator equipment across multiple project sites. This role is responsible for inspecting, servicing, and maintaining diesel and natural gas generators to ensure reliable operation and compliance with manufacturer specifications and safety standards. The Mechanic will diagnose and resolve mechanical, electrical, and environmental control system issues, complete service documentation accurately, and coordinate with project managers and site personnel as needed. Additionally, the position requires travel—often on short notice—to support maintenance activities and emergency response efforts, while maintaining a high level of independence and technical proficiency in both HVAC and power generation systems.

You will:

• Perform preventive maintenance, diagnostics, and repair on HVAC systems, including:
  • Portable HVAC units
  • Air handlers
  • Chillers
  • Rooftop units (RTUs)
  • Split systems
  • Ventilation systems
• Inspect, maintain, and service diesel and/or natural gas generators generally ranging from 20kW to 200kW
  • Conduct load testing
  • Perform minor repairs and system checks
  • Mixed environments (3-phase and single-phase systems)
• Diagnose mechanical, electrical, and control system issues and implement effective solutions
• Conduct system performance evaluations to ensure compliance with manufacturer specifications and safety standards
• Complete service reports, maintenance logs, and documentation accurately and on time
• Travel frequently (often at short notice) to support maintenance and emergency service needs
• Coordinate with project managers, facility personnel, and subcontractors
• Ensure compliance with OSHA standards, state and local standards, company policies, and site-specific safety requirements
• Maintain tools, equipment, and company vehicles in good working condition
• Assist with system installations and upgrades as needed

You might be the professional we’re looking for if you have:

• 3+ years of HVAC maintenance and repair experience (commercial or industrial preferred)
• Working knowledge of HVAC systems, controls, and mechanical/electrical components
• Experience servicing generators (diesel, natural gas, or standby systems)
• EPA Section 608 Certification (Universal preferred)
• Ability to read and interpret technical manuals, schematics, and blueprints
• Strong troubleshooting and problem-solving skills
• Valid driver’s license
• Willingness to travel
• Ability to work independently with minimal supervision
• Physically capable of:
  • Lifting up to 50 lbs
  • Working in confined spaces
  • Climbing ladders
  • Working outdoors in various weather conditions

We will be extra impressed if you have:

• Journeyman HVAC license or equivalent certification
• OSHA 10 or OSHA 30 certification
• Generator certifications (e.g., Cummins, CAT, Generac)
• Experience in government, federal, or mission-critical environments
• Forklift operation experience