Engineer Sr, Reliability

Eos Energy Storage; Edison (NJ); On-site; USD 90,000 - 120,000; Full time

Job summary

Eos Energy Storage, headquartered in Edison, New Jersey, is looking for a Sr. Reliability Engineer to enhance system reliability in battery management systems (BMS). The role involves leading reliability objectives, developing test plans, and analyzing component degradation. Ideal candidates will have a Bachelor's in Electrical Engineering and at least 8 years of relevant experience.

This position offers the opportunity to work closely with cross-functional teams in a rapidly growing industry focused on sustainable energy. Come join a dynamic team committed to innovation.

Qualifications

• 8 years of experience in systems engineering, reliability engineering, or related fields.
• Strong understanding of environmental stress testing.
• Experience with degradation mechanisms in electronic components.

Responsibilities

• Lead reliability objectives for battery storage hardware.
• Develop long-term reliability test plans for BMS circuit boards.
• Identify components with potential wear-out mechanisms.
• Participate in recurring reliability reviews with engineering teams.

Skills

Electronic component reliability

SR 332 modeling

AFR/DPPM estimation

Environmental stress testing

Root-cause analysis

Education

Bachelor’s degree in electrical engineering

Tools

Relyence

RelCalc

Job description

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 overcomes the limitations of conventional lithium‑ion technology, providing safe, scalable, efficient, and sustainable energy storage for 3‑12 hour applications. Founded in 2008 and headquartered in Edison, New Jersey, Eos is listed on Nasdaq (NASDAQ: EOSE).

Job Summary

The Sr. Reliability Engineer will support overall system reliability by developing electronic‑based failure bathtub curves, modeling long‑term reliability, and defining accelerated test plans for battery management systems (BMS). The engineer will work closely with hardware, systems, and software teams to analyze failure modes, validate reliability assumptions, and drive corrective actions.

Job Responsibilities

• Lead reliability objectives for battery storage hardware, including PCBAs and electromechanical assemblies.
• Develop long‑term reliability test plans for all BMS circuit boards, including thermal cycling, damp heat, and other environmental stresses aligned with warranty requirements.
• Estimate annual failure DPPM (AFR%) using SR‑332 standards and reliability modeling tools.
• Assess expected field use conditions including power‑on hours (POH), temperature exposure, and duty cycle.
• Identify components with potential wear‑out mechanisms and develop degradation or failure‑rate models as needed.
• Determine acceleration factors and test durations based on agreed field use assumptions.
• Detect wear‑out failure modes during testing, coordinate root‑cause investigations, and recommend corrective or preventive actions.
• Create HALT (Accelerated Life Test) plans to uncover early‑life and latent failure mechanisms and assess relevance to field conditions.
• Develop HASS (Highly Accelerated Stress Screening) plans to evaluate ongoing production product quality.
• Participate in recurring reliability reviews with engineering teams to track progress, risks, and timelines.
• Provide guidance on system‑level and software‑related reliability considerations, including interactions between hardware, firmware, and operational conditions.
• Support broader reliability initiatives within the battery storage platform as needed.

Education & Experience

Bachelor’s degree in electrical engineering required; 8 years of experience in systems engineering, reliability engineering, or related fields.

Skills & Abilities

• Experience with electronic component reliability, SR 332 modeling, and AFR/DPPM estimation.
• Proficiency with reliability modeling tools such as Relyence, RelCalc, or similar.
• Strong understanding of environmental stress testing (thermal cycling, humidity, HALT, etc.).
• Familiarity with degradation mechanisms in electronic components and PCB assemblies.
• Experience conducting root‑cause analysis and developing corrective actions for wear‑out failures.