Field Service Technician III - Solar & Battery ESS

Renewable Energy Systems (RES); San Antonio (TX); On-site; USD 46,000 - 58,000; Full time

Benefits offered by this job

Medical, Dental and Vision

401(k) plan with company match

PTO & Holidays

Parental Leave

Life Insurance

Job summary

Renewable Energy Systems (RES) seeks a Field Service Technician III to support senior technicians in operating and maintaining utility-scale solar facilities. You will perform preventative and corrective maintenance on solar panels, trackers, and inverters to ensure reliability and safety.

The role requires troubleshooting of high and medium voltage systems, hands-on use of tools, and coordination with project stakeholders. A strong safety mindset and willingness to travel will help you succeed.

Qualifications

• High school diploma or GED required; technical degree preferred.
• 4+ years of electrical maintenance experience.
• 2+ years of medium voltage work; 1+ year high voltage preferred.
• OSHA 10/30 certification preferred; FAA Part 107 Drone Pilot preferred.
• Valid driver's license required; willingness to travel 5-15%.

Responsibilities

• Assist senior technicians with operating and maintaining solar facilities.
• Perform preventative and corrective maintenance on PV assets (panels, trackers, inverters).
• Troubleshoot LV/ MV/ HV electrical systems and return to service safely.
• Interface with owners, manufacturers, subcontractors, and internal teams.
• Respond to priority emergency calls within 1.5 hours; participate in rotating on-call.
• Follow safety policies, LOTO procedures, and site-specific operating plans.

Skills

Electrical maintenance

MV electrical work

HV electrical work

Drone Pilot (FAA Part 107)

OSHA 10/30

Driver's license

CMMS usage

SCADA familiarity

Microsoft Office

Education

High school diploma or GED

Associate degree in related technical field

Tools

CMMS

SCADA systems

Microsoft Office

Job description

Renewable Energy Systems (RES) seeks a Field Service Technician III to support senior technicians in operating and maintaining utility-scale solar facilities. You will perform preventative and corrective maintenance on solar panels, trackers, and inverters to ensure reliability and safety.

The role requires troubleshooting of high and medium voltage systems, hands-on use of tools, and coordination with project stakeholders. A strong safety mindset and willingness to travel will help you succeed.