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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.