Field Operations Engineer - Battery Storage & Grid (Onsite)

Critical Loop; Long Beach (CA); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Stock options

Health coverage

Retirement plan

Unlimited PTO

Job summary

Critical Loop is hiring a Site Operations Engineer to support deployment, operation, and maintenance of mobile BESS fleets and related energy systems. You will ensure safe field operations, maximize uptime, and collaborate with controls and software teams on testing and validation of control logic.

The role is hands-on, customer-facing, with travel up to 25% and on-site work at various customer sites across California.

Qualifications

• Experience operating or supporting battery energy storage systems or similar power assets in the field.
• Hands-on experience with power electronics, field maintenance, and troubleshooting issues across hardware, software, and networking.
• Has worked on 480V or higher systems and can safely verify de-energized conditions before every touch.
• Experience using backend or controls software to monitor and operate energy systems.
• Customer-facing experience and strong communication skills, including difficult conversations when systems are down or timelines slip.
• Comfortable managing work on a job site independently with minimal supervision.
• Familiarity with electrical safety practices and regulatory standards.

Responsibilities

• Manage fleet scheduling, dispatch, deployment, and retrieval to ensure reliable service delivery across active customer sites.
• Oversee site readiness, electrical connections, grounding, and system startup during deployments.
• Execute commissioning of battery energy storage and power systems in the field, safely verifying de-energized conditions before every touch.
• Develop and execute preventive and corrective maintenance plans to maximize fleet uptime.
• Lead hands-on troubleshooting of electrical, mechanical, battery, and power electronics issues independently using a structured diagnostic process.
• Serve as the primary escalation point for on-site and remote troubleshooting and customer support.
• Coordinate logistics, transportation, staging, and heavy equipment movement for deployments.
• Operate and test system control logic, state machines, and transitions between operating modes.
• Maintain accurate documentation on fleet status, maintenance activities, telemetry, and system performance.
• Communicate clearly with engineering teams on field findings and open issues, and with customers on status and resolution timelines.
• Provide on-call support in on-call rotation.
• Frequent site visits to customer sites up to 25% of time.

Skills

Battery energy storage

Power electronics troubleshooting

On-site field maintenance

Customer-facing communication

Risk-aware safety practices

Tools

Modbus protocols

Telemetry platforms

Industrial controls software

Job description

Critical Loop is hiring a Site Operations Engineer to support deployment, operation, and maintenance of mobile BESS fleets and related energy systems. You will ensure safe field operations, maximize uptime, and collaborate with controls and software teams on testing and validation of control logic.

The role is hands-on, customer-facing, with travel up to 25% and on-site work at various customer sites across California.