Site Operations Engineer
Critical Loop · Long Beach
About Critical Loop
Critical Loop is shaping the next generation of energy systems by building the integrated edge grid of the future. Specializing in advanced energy management and battery control systems, Critical Loop empowers businesses and communities to seamlessly unite distributed energy resources for faster, more reliable, and affordable grid access. With deep expertise in grid modernization and a passion for creating resilient, responsive energy solutions, Critical Loop drives innovation at the intersection of technology and energy.
Site Operations Engineer
Critical Loop | Full-Time | On-SIte | Multiple Openings
The Role
We are hiring operations engineers to support the deployment, operation, maintenance, and performance of our mobile BESS fleet and other distributed energy systems. You will ensure safe and reliable field operations, drive rapid customer response, and maintain high system uptime across active sites. You will also work closely with our hardware, controls and software teams to test and validate new power system architectures and control logic across diverse power applications.
This is a hands-on, customer-facing role with direct impact on daily operations and product evolution. If you need close oversight to function or treat safety as secondary to speed, this is not the right fit.
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What You'll Do
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
Must-Haves
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 such as LOTO procedures and live-dead-live testing
Ability to lift 50-75 lbs and willingness to work outside in extreme elements
Nice-to-Haves
Experience with BESS, UPS, inverters, DC infrastructure, portable switchgear, or microgrid systems
Experience with mobile or portable power systems and fleet management
Basic coding experience or familiarity with Python, Julia, R, or MATLAB
Experience writing or modifying site configurations and defining state transitions for deployed systems
Quality wiring, terminations, and ferrule work to a professional standard
Familiarity with fleet management systems or telemetry platforms
Familiarity with Modbus or similar industrial control protocols
Prior background in a startup or fast-scaling operations environment
Certifications in battery systems, heavy equipment operation, or electrical safety
Work Authorization: Critical Loop does not provide visa sponsorship for this role. Please do not apply for this role if at any time (now or in the future) you will need immigration support (i.e H-1B, TN, STEM OPT training plans etc.).
At Critical Loop, we're committed to rewarding and supporting our team. Our benefits package includes equity ownership through stock options, giving you a stake in our success, along with comprehensive health coverage (medical, dental, and vision) through an HRA with a generous allowance. We also provide a retirement savings plan and unlimited paid time off so you can recharge and maintain work-life balance.
Critical Loop is an equal opportunity employer. We're committed to building a diverse team and creating an inclusive workplace where everyone can thrive. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other protected characteristic under applicable law.