Senior Field Service Engineer; FSE

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.

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.

• 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.

• 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,…