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Senior Field Service Engineer (FSE)

Epirus · Torrance, California, United States · 2026-04-22

executive
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About this role

About Epirus

Epirus is a high-growth technology company developing solid-state, software-defined directed energy systems that enable unprecedented counter-electronics effects and power management solutions to optimize power efficiency in defense and commercial applications. With a constant emphasis on innovation, we are redefining the future of power to bring tomorrow’s capabilities to life, today. And that’s just the beginning.

Job Summary: Epirus is seeking a Field Service Engineer (FSE) III with the ability to provide advanced technical support, troubleshooting, and operational oversight in support of Epirus High Power Microwave Counter Unmanned Aerial Systems (HPM-CUAS). This individual will work as a member of a small team with a primary focus on the maintenance, training support and sustainment of fielded HPM assets. The FSE will directly support the maintenance of the fielded HPM-CUAS equipment, re-installation of Line repairable units (LRUs), training, integration, and sustainment of these solutions with existing client infrastructure at CONUS and OCONUS locations. Candidate will provide hands-on support for HPM-CUAS technical, network, and integration projects. This role requires hands-on expertise in electrical, mechanical, and software systems, as well as the ability to work in high-pressure situations supporting defense operations.

This position requires a high degree of technical skill, personal resilience and flexibility, strong interpersonal skills, and the ability to work as part of a cross-functional team in a variety of physical environments.

Responsibilities:

• Work closely with engineering teams to provide feedback on system performance and potential design improvements.

• Coordinate with project managers, logistics personnel, and customers to ensure timely resolution of issues.

• Conduct install/uninstall of HPM-CUAS systems in a variety of locations / environmental conditions to support client operations, test and evaluations, Tactics, Techniques and Procedure (TTP) / Doctrine development, and New Equipment Training (NET) courses.

• Make recommendations on equipment modifications/upgrades based on experience gained through testing and operational use of HPM-CUAS systems.

• Deploy overseas locations to perform technical inspections, system checks, fault diagnosis, identify cause of failures, and replace Line Repairable Unit (LRU), test and restore HPM-CUAS systems to full functionality.

• Conduct advanced programming of HPM-CUAS systems (install/upgrade firmware, software upgrades, etc.).

• Work with the Epirus training and enablement team to develop and conduct training on the proper care, use, maintenance, and preventive maintenance of systems.

• Work closely with engineering teams to provide feedback on system performance and potential design improvements.

Basic Qualifications:

• Bachelor’s degree in Electrical Engineering, Mechanical Engineering, Physics, or a related technical field AND minimum 5 years of related experience (or 3 years and a Master’s degree).

• Proficiency in troubleshooting and repair of electronic and mechanical systems.

• Knowledge of high-power RF generation, wave propagation, and directed energy principles.

• Familiarity with test equipment (oscilloscopes, spectrum analyzers, RF power meters, etc.).

• Strong technical writing and verbal communication skills.

• Ability to provide technical advice and guidance on installation, adaptation, configuration and/or enhancement of company technical products, programs, and systems.

• Candidate must hold a valid U.S. passport or have the ability to obtain a U.S. passport.

• Military experience with CUAS Systems (RF Detection, Radar, EO/ IR Optical systems, Command and Control (C2) Systems.

• Experience working in field operations, including deployment in austere or challenging environments.

• Experience working independently or as a team member to solve project and/or engineering problems.

• Ability to use and communicate a wide variety of technical data from OEM manuals, engineering drawings, etc. to engineers as well as to non-technical system end users.

• The position requires daily interaction with customers at multiple levels.

• Candidate must possess and use a high degree of tact and interpersonal communication skills in daily interactions with team members, clients, vendors, and end users.

• This position requires the ability to obtain and maintain a SECRET security clearance, which is issued by the U.S. government. U.S citizenship is required to obtain a security…

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