Senior Engineer, Reliability
Eos Energy Enterprises
Company Overview
Eos Energy Enterprises, Inc.
Edison, NJ, United States
2008
Approximately 430 employees (source: stockanalysis.com).
What They Do
Eos Energy Enterprises specializes in developing innovative zinc-powered battery energy storage systems (BESS), particularly their proprietary Znyth® aqueous zinc battery technology. This technology is designed for long-duration energy storage, offering discharge durations ranging from 3 to 12 hours, which provides a viable alternative to traditional lithium-ion and lead-acid batteries. The company emphasizes safety, scalability, and efficiency, with a 20-year useful life for its products, all manufactured in the U.S. (source: stockanalysis.com). Their product lineup includes the Z3 battery module, battery management systems for remote monitoring, and comprehensive project management services, catering to utility-scale, microgrid, and commercial applications to address grid complexity and renewable energy intermittency (source: eose.com). Target markets include utilities, independent power producers, and commercial customers, with a focus on integrating renewable energy sources like solar and wind into their systems (source: mapquest.com). Eos differentiates itself through its non-flammable zinc chemistry, positioning against competitors such as ESS Inc. and Form Energy, and aims to enhance grid stability through long-duration storage solutions (source: dcfmodeling.com).
Projects & Track Record
Eos Energy Enterprises has made significant strides in the energy storage sector, with notable projects including the first commercial shipments of its Znyth® technology in 2017, marking a successful transition from research and development to market entry (source: dcfmodeling.com). A key project involved a $20 million order from EnerSmart for a 9MWh installation in El Cajon, California, aimed at enhancing grid stability and scheduled for deployment in Q4 2021 (source: eose.com). Ongoing projects include a commitment to deliver between 90MWh and 180MWh of Znyth®-powered storage across multiple locations in California, reflecting the growing demand for long-duration energy solutions (source: eose.com). The expansion of their Turtle Creek manufacturing facility is crucial for scaling production to meet these demands and support future growth (source: dcfmodeling.com). Key clients include EnerSmart, which focuses on utility-scale projects, and partnerships are being developed to enhance supply chain efficiency and installation speed (source: eose.com).
Recent Developments
In recent years, Eos Energy Enterprises secured its largest order to date, a $20 million contract from EnerSmart for energy storage solutions, underscoring the increasing demand for their technology in California (source: eose.com). The company has also aggressively expanded its manufacturing capabilities at the Turtle Creek facility, transitioning to high-volume production following its public listing in 2020 (source: dcfmodeling.com). While no specific acquisitions or mergers have been reported since the SPAC merger, the EnerSmart deal represents a significant commercial milestone for Eos, highlighting its growth trajectory in the energy storage market (source: eose.com).
Working There
Eos Energy Enterprises offers a diverse range of roles across various departments, including engineering, product management, sales, marketing, operations, finance, and HR. The company actively recruits talent for positions in software development, infrastructure, and storage systems, with a focus on fostering innovation and collaboration within its teams (source: salestools.io). Most hiring occurs at the Edison headquarters, which is designed to support growth and innovation, as well as at the Turtle Creek manufacturing sites (source: eose.com). Eos promotes a company culture centered on continuous learning, employee well-being, and teamwork, with amenities that include open-plan offices, collaboration spaces, and fitness centers to enhance the work environment (source: salestools.io). While specific benefits such as health plans or PTO are not detailed, the company positions itself as a place where employees can make a positive impact through their work in clean energy (source: salestools.io).
Last updated on Feb 23, 2026 | Report an issue
Job Description
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.
Job Summary
The Sr. Reliability Engineer will be responsible for supporting overall system reliability by developing the electronic‑based failure bathtub curve, 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 upon 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
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.
Apply now
Job expired?Please let Eos Energy Enterprises know you found this job on Rejobs. It helps us grow and get more people working in renewable energy.
Apply now
Job expired?Please let Eos Energy Enterprises know you found this job on Rejobs. It helps us grow and get more people working in renewable energy.
See how you’re connected
View connectionsSee your contacts at Eos Energy Enterprises on LinkedIn and tap your network when applying for this position.
Get job alerts
Get alerts for Battery Management Systems jobs in Edison, United States
Join Talent Pool
Let clean energy employers find you
About the role
June 5, 2026
Full time
Company
- Edison, United States
8 years
UTC-05:00
