Field Service Engineer - Rotary UPS

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About IEM

Industrial Electric Mfg. (IEM) is the largest independent full-line manufacturer of custom power distribution systems in North America. Founded more than 75 years ago in Fremont, California, IEM grew alongside Silicon Valley and today operates over 1.7 million square feet of manufacturing capacity. With $1B+ in annual sales and 10,000+ commissioned projects across technology, data centers, commercial, energy, utilities, healthcare, industrial, and infrastructure markets, IEM delivers exceptional product quality, dependable service, and the flexibility to meet complex technical requirements at scale.

Job Summary

The Senior Field Service Engineer – RUPS Systems specializes in rotary UPS power system distribution builds, mechanical and generator integration, system integration, start-ups, and preventative maintenance programs. This role requires advanced technical expertise, mechanical aptitude, leadership skills, and hands-on field experience with both electrical control systems and rotating equipment such as generators and flywheels. Strong troubleshooting skills and a commitment to delivering high-performance power solutions in data centers, hospitals, industrial facilities, and utility-scale environments are essential.

This position focuses on large-scale RUPS systems rather than a typical UPS engineer role. The ideal candidate will have experience with mechanical systems, generators, and rotary equipment, and be comfortable commissioning complex power systems in the field. You will act as the front-line expert for bringing large-scale RUPS systems online, resolving technical issues, and training others. The engineer will provide technical software and hardware troubleshooting support to IEM customers on-site across North America while performing start-ups, retrofits, or preventative maintenance.

You will work with cross-functional IEM teams to integrate current and new technologies, commission complex generator and RUPS systems, optimize power infrastructure, and ensure seamless operation as defined by the customer’s RUPS design and sequence of operations (SOO). You will serve as the point of contact for all field service personnel related to RUPS startup, generator support, preventative maintenance, 24-hour emergency response, and remote technical assistance.

Key Responsibilities

• Lead and perform on-site startup, commissioning, and preventative maintenance of RUPS systems, including generator integration, flywheel validation, and facility electrical infrastructure.
• Perform functional testing, load bank testing, system synchronization, and complete system validation to ensure components meet performance specifications.
• Troubleshoot and resolve complex electrical and mechanical issues related to generators, flywheels, switch gear, control systems, fuel systems, and coupling assemblies.
• Follow a scientific, step-by-step process to troubleshoot equipment issues; capture data and troubleshooting steps clearly for internal and external communication.
• Work with 3rd party equipment vendors and customers to resolve recurring issues with vendor equipment within IEM’s integrated RUPS systems.
• Perform functional tests, load tests, synchronization, and RUPS system validation.
• Interface with clients, contractors and internal IEM teams during commissioning and acceptance testing.
• Ensure startup and commissioning documentation, test reports, on-site daily reports, and required customer records are completed accurately and on time.
• Provide technical support and guidance during new installations and system upgrades.
• Train Field Service junior technicians on startup, commissioning procedures, troubleshooting protocols, preventative maintenance, and safe operation of equipment.
• Maintain compliance with industry and company safety standards, procedures, and client-specific safety protocols.
• Communicate with Product Engineering and Design Teams regarding product bulletins affecting service, software upgrades, product upgrades, or maintenance factors.
• Travel to customer sites to lead commissioning activities with junior…