About Eos Energy Enterprises

Eos Energy Enterprises, Inc. is accelerating the shift to American energy independence with positively ingenious solutions that transform how the world stores power. Our breakthrough Znyth™ aqueous zinc battery was designed to overcome the limitations of conventional lithium-ion technology. It is safe, scalable, efficient, sustainable, manufactured in the U.S., and the core of our innovative systems that today provides utility, industrial, and commercial customers with a proven, reliable energy storage alternative for 3 to 12-hour applications. Eos was founded in 2008 and is headquartered in Edison, New Jersey. For more information about Eos (NASDAQ: EOSE), visit eose.com.

About the Role

This role sits at the intersection of Eos's battery system design and its real-world deployment, closing the loop between how our BESS is engineered and how it is actually built, commissioned, and serviced in the field. The Engineer, Product Serviceability & Field Reliability will translate field failure data, commissioning friction, and O&M feedback into concrete product design inputs — while equipping Field Services and EPC partners with the technical standards, diagnostics, and documentation needed to service Eos systems efficiently and safely.

Responsibilities

• Serve as the primary technical liaison between Product Engineering and Field Services/execution, ensuring design decisions account for constructability, commissioning sequencing, and long-term serviceability.

• Support Field Quality team lead root cause analysis (RCA) on field-reported hardware/firmware failures and translate findings into design change requests, retrofit specs, or service bulletins.

• Build and maintain or support SQL-based fleet telemetry monitoring to flag precursor failure signatures across deployed Eos systems, and use Python for diagnostic scripting and trend analysis.

• Author and maintain technical due diligence standards and field-readiness documentation used by EPC partners, Field Services, and internal stakeholders.

• Identify and resolve thermal, mechanical, and power-delivery bottlenecks that impact serviceability, commissioning timelines, or asset reliability.

• Partner with Commissioning and Field Services teams to reduce time-to-resolution on site issues by improving diagnostic tooling, spare parts logic, and troubleshooting documentation.

• Support RFP and pre-sale technical due diligence by providing serviceability and reliability input on proposed system designs.

• Contribute to fleet-wide uptime KPIs and report data-driven reliability trends to Deployment leadership.

Education and Experience

• 5+ years in utility-scale BESS or related power systems, with direct experience bridging OEM/product engineering and EPC/field execution.

• Demonstrated experience in performance testing, capacity validation, or commissioning of megawatt-scale energy storage systems.

• Strong root cause analysis background across hardware/firmware failure modes.

• Proficiency in SQL for fleet telemetry monitoring and Python for diagnostic/data analysis.

• Experience authoring technical standards or due diligence documentation used cross-functionally.

• M.S. in Engineering (or equivalent experience); specialization in sustainable energy systems a plus.

• Comfortable operating in ambiguity at a growth-stage OEM, translating field-level signal into upstream design action.

Travel

• Local Travel

• Overnight/North America: 75%

Working Conditions

• Office Environment - Must be able to remain in a stationary position 50% of the time and occasionally move about inside the office to access file cabinets, office machinery, etc.  Required to have close visual acuity to perform an activity such as: preparing and analyzing data and figures; transcribing; viewing a computer terminal; extensive reading. May be required to exert up to 25 pounds of force occasionally to lift, carry, push, pull or otherwise move objects, including the human body.

• Customer/Partner Locations – Employee may visit customer or partner locations that may be comprised of office, manufacturing floor, laboratory environments and construction sites depending on the location and reason for visit.