Master Electrician - Battery Energy Storage Systems (BESS)

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. POSITION SUMMARY Critical Loop is looking for a Master Electrician with deep experience in utility-scale Battery Energy Storage Systems (BESS) to lead the electrical execution of our field deployments. This role will serve as the technical expert for installation, commissioning, troubleshooting, and service activities across our battery storage fleet. This is a hands-on leadership role. We're looking for someone who is just as comfortable troubleshooting a live system as they are mentoring junior electricians, making field decisions, and partnering with engineering to solve complex problems. RESPONSIBILITIES - Lead electrical installation, commissioning, maintenance, and troubleshooting of utility-scale BESS systems. - Perform factory acceptance testing (FAT) including continuity testing, joint impedance measurement, phase rotation verification, multi-phase commissioning, energization, and functional testing. - Perform and oversee commissioning activities including phase rotation verification, multi-phase commissioning, energization and startup, functional testing, and point-to-point verification. - Perform high-voltage AC/DC troubleshooting. - Safely isolate, de-energize, verify zero energy, and return BESS systems to service. - Install, replace, and troubleshoot PCS/inverters, combiners, transformers, switchgear, breakers, communication systems battery racks/modules, and communication systems. - Interpret electrical drawings, one-line diagrams, wiring diagrams, and commissioning procedures. - Routing and installation of high ampacity terminations ranging from 2/0 to 500 MCM wire - Support root cause analysis of electrical failures. - Working with documented work instructions, QA hold points, and torque/inspection requirements. - Partner with Engineering to resolve field issues and improve product reliability. - Mentor and develop junior field technicians and electricians. - Maintain NFPA 70E, OSHA, LOTO, and all site safety requirements. - Travel up to 30% to customer sites for commissioning, maintenance, and troubleshooting activities. REQUIRED QUALIFICATIONS - Master Electrician license or equivalent Journeyman-level experience with demonstrated field leadership. - 8+ years of industrial, utility, or commercial electrical experience. - 3+ years of hands-on experience with utility-scale Battery Energy Storage Systems (BESS). - Experience commissioning and servicing Tesla Megapack, Fluence, Sungrow, Powin, Wärtsilä, BYD, or similar utility-scale energy storage platforms. - Experience working with 480V AC, 1000–1500V DC battery systems, and medium-voltage electrical equipment. - Hands-on experience with inverter installation and commissioning — EG4, SMA, Sungrow, SolarEdge, or comparable platforms. - Strong understanding of battery systems, including series and parallel configurations, battery management systems (BMS), phase rotation, multi-phase commissioning, arc flash, and DC electrical hazards. - Experience performing lockout/tagout (LOTO), live-dead-live verification, and electrical testing using multimeters, insulation resistance testers, and phase rotation meters. - Ability to read and interpret electrical schematics, one-line diagrams, wiring diagrams, and technical documentation. - Valid driver's license and ability to travel as needed. PREFERRED QUALIFICATIONS - SCADA, Modbus, or BMS communications troubleshooting experience. - Hands on experience with cable connections in tran…