Aerospace Defense HVAC Technician (On-Call)

Castelion Corporation; Torrance (CA); On-site; USD 60,000 - 90,000; Full time

Job summary

Castelion is rapidly advancing defense technology and seeking an HVAC technician to maintain critical facility systems in Torrance, CA. The role involves preventative maintenance, on‑call tasks, and collaboration with a skilled maintenance team to support production operations.

Required is a High School Diploma with 4 years of HVAC experience, EPA Universal Certification, and a CA Driver’s license. You will work with blueprints, service records, and building automation elements in a

Qualifications

• High School Diploma or equivalent with 4 years of experience in HVAC, chillers and related systems.
• Must own Basic HVAC Tools.
• Must possess a Universal EPA certification and an Active California Driver’s License.
• Familiarity with electrical/electronic components related to air conditioning and refrigeration equipment.

Responsibilities

• Perform repairs and maintenance on HVAC and process cooling equipment including AHUs, chillers, cooling towers, VAVs, heaters, boilers, air compressors, air dryers and freezers.
• Inspect equipment to identify repair needs before breakdowns occur.
• Troubleshoot, test, inspect, and repair mechanical and refrigeration equipment using hand and power tools.
• Review blueprints, sketches, wiring diagrams, and equipment specifications.
• Install, service, modify, rebuild and perform preventive maintenance following building codes and safety regulations.

Skills

HVAC troubleshooting

Blueprint reading

Safety compliance

Communication skills

Education

EPA Universal Certification

Active CA Driver’s License

Tools

Multimeter

Basic HVAC tools

Job description

Castelion is rapidly advancing defense technology and seeking an HVAC technician to maintain critical facility systems in Torrance, CA. The role involves preventative maintenance, on‑call tasks, and collaboration with a skilled maintenance team to support production operations.

Required is a High School Diploma with 4 years of HVAC experience, EPA Universal Certification, and a CA Driver’s license. You will work with blueprints, service records, and building automation elements in a