Field Reliability Engineer – Product Serviceability & Diagnostics

Eos Energy Enterprises, Inc.; Edison (NJ); On-site; USD 110,000 - 160,000; Full time

Job summary

Eos Energy Enterprises, Inc. seeks an Engineer, Product Serviceability & Field Reliability to translate field failure data into concrete product design inputs and to equip Field Services and EPC partners with technical standards, diagnostics, and documentation.

The role sits at the nexus of design and field deployment for BESS systems across the Americas. The candidate will build telemetry, analyze trends with Python, and author field-ready standards while collaborating with Commissioning, Field

Qualifications

• 5+ years in utility-scale BESS or related power systems bridging OEM/product engineering and EPC/field execution.
• Experience in performance testing, capacity validation, or commissioning megawatt-scale energy storage.
• Strong root cause analysis across hardware/firmware failures.
• Proficiency in SQL for fleet telemetry monitoring and Python for diagnostics.
• Experience authoring technical standards or due diligence documentation used cross-functionally.
• Comfortable operating in ambiguity at a growth-stage OEM.

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 RCA on field-reported hardware/firmware failures and translate findings into design change requests, retrofit specs, or service bulletins.
• Build and maintain SQL-based fleet telemetry monitoring and use Python for diagnostic scripting and trend analysis.
• Author and maintain technical due diligence standards and field-readiness documentation for EPC partners and internal stakeholders.
• Identify and resolve thermal, mechanical, and power-delivery bottlenecks impacting serviceability and commissioning timelines.
• Partner with Commissioning and Field Services to reduce time-to-resolution on-site issues by improving diagnostic tooling and spare parts logic.
• Support RFP and pre-sale technical due diligence with serviceability and reliability input on system designs.
• Contribute to fleet-wide uptime KPIs and report reliability trends to Deployment leadership.

Skills

SQL

Python

Root cause analysis

Education

M.S. in Engineering

Equivalent experience

Sustainable energy systems (plus)

Job description

Eos Energy Enterprises, Inc. seeks an Engineer, Product Serviceability & Field Reliability to translate field failure data into concrete product design inputs and to equip Field Services and EPC partners with technical standards, diagnostics, and documentation.

The role sits at the nexus of design and field deployment for BESS systems across the Americas. The candidate will build telemetry, analyze trends with Python, and author field-ready standards while collaborating with Commissioning, Field