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Eos Energy Enterprises

Project Engineer II (m/w/d)

Become a Project Engineer II with Eos Energy Enterprises in East Pittsburgh, Pennsylvania. Lead the design and development of Battery Energy Storage Systems while collaborating with cross-functional teams. Enjoy a supportive work culture and opportunities for professional growth.

Eos Energy Enterprises

Company Overview

Eos Energy Enterprises

Edison, NJ, United States

2008

Business Model

Energy Storage

Development and manufacturing of energy storage systems

Sales of energy storage systems, service contracts, and partnerships

Locations & Geography

United States, Canada, Europe, Asia, Australia

Company Culture

Their mission is to provide sustainable energy solutions through innovative technology.

They promote a collaborative and inclusive work environment.

They offer training programs and career advancement opportunities.

Activities & Projects

They are currently working on large-scale energy storage projects across the United States.

They have developed a unique zinc-based battery technology.

They focus on environmentally friendly manufacturing processes and materials.

Career Opportunities

Typical job openings include engineering, project management, and sales positions.

They offer competitive salaries, health benefits, and flexible work arrangements.

Contact Information

LinkedIn

Careers at Eos Energy Enterprises


Last updated on 2025-09-06 | 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.

The Project Engineer II will be responsible for performing, and times leading, technical work to deliver Battery Energy Storage Systems (BESS). Project Engineer II will work with cross-functional teams to ensure technical requirements for clients BESS (Battery Energy Storage) projects are fulfilled to company and customer expectations. This is a customer facing position, to create utility scale battery storage systems throughout the United States and the rest of the world.

Accountable For

Executing project engineering efforts in developing and designing battery energy storage systems (BESS) as well as their power electronics and controls. The tasks include maintaining existing projects and supporting the creation of automated test equipment for project deployments.

Responsibilities

  • Create and review engineering the design of contracted energy storage projects. This position requires someone with a valid PE license in electrical engineering to be able to validate and stamp drawings.
  • Lead the design and review of BESS, including power conversion systems (Inverters & DC/DC Converters), isolation and power transformers, medium voltage switchgear, protection and control systems, grounding, low and medium voltage ac and dc cable systems, and plant auxiliary equipment.
  • Experienced in troubleshooting of high voltage battery systems including the hardware power conversion devices such as inverters, converters, transformers and other related auxiliary systems. Perform load flow, short circuit, arc flash, and grounding studies.
  • Work closely with Project Managers, Engineers, Customers, AHJs, and others to meet the contractual commitments. Collaborate with multidisciplinary teams including mechanical, civil, and software engineers. Play also a role as a technical consultant for more junior project engineers.
  • Develop and review electrical schematics, single-line diagrams, and system layouts. Lead development of specifications, drawings and controls and protections strategies for contracted projects.
  • Participate in continuous improvement of standard processes, procedures, documentation, and tools to effectively deliver a wide range of project solutions. Specify and select components including inverters, converters, transformers, switchgear, and protection devices.
  • Ensure that all project engineering deliverables are on schedule / on budget and communicate project status to internal and external audiences via standardized project controls systems.
  • Become the Project Engineering BESS SME and internal engineering interface. Work with other engineers pre- and post-contract award to optimize customer BESS solutions, use case reviews and commercial proposal strategies and processes.
  • Maintain project documentation and assist in creating vendor technical specifications and user instructions for optimal use of the designed BESS.
  • Provide support to Field Service Technicians when troubleshooting in field commissioning and service operations.
  • Understands and utilizes technical standards for reviews, documentation, and designs such as UL, UN, IEC, ISO, ECE and other engineering standards. Ensure compliance with national and international electrical codes (e.g., NEC, IEEE, IEC).
  • Collaborate with Product Engineering to define, refine and improve BESS systems.
  • Support permitting, interconnection, and utility coordination processes. Provide technical oversight during construction, commissioning, and testing phases.
  • Other duties, responsibilities and activities may change or be assigned at any time with or without notice, in the spirit of an agile design group within an active technology company.

Knowledge, Skills, and Abilities

  • Ability to work independently and on-site and understand how components fit into a larger system
  • Working knowledge of embedded control systems and their applications
  • General knowledge of CAD and the ability to interpret mechanical and electrical engineering drawings.
  • Strong troubleshooting skills for diagnosis and design improvement
  • Familiarity with design for ground fault and EMC and availability to trace down GFI and EMI issues
  • Awareness of safety certification process to standards such as UL
  • Competent skills with communications protocols such as SCADA, EMS, TCP/IP, CAN, i²C and SPI; use of Modbus
  • Capability to select and integrate off-the-shelf component and equipment
  • Strong cross-discipline system skills
  • Understanding of hardware and physical system being controlled is required
  • Comfort and experience with the hazard and safety protocols of high voltage equipment and other aspects of working with large-scale battery systems
  • Ability to self-direct to a goal and achieve independent success

Education and Experience

  • BS in Electrical Engineering, Computer Science, Computer Engineering (MS degree preferred) or related field
  • Professional Engineer License Required
  • Minimum of 5+ years of experience in all aspects of engineering development and product delivery.
  • Hardware and system design and troubleshooting.
  • Minimum five years' experience designed electronics and developing automated controls
  • Engineering Design Software experience
  • Linux, embedded systems
  • High voltage electrical systems

Travel

  • Overnight/North America: Less than 10%

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.
  • Factory - The worker may be subject to hazards. Includes a variety of physical conditions, such as proximity to moving mechanical parts, vibration, moving vehicles, electrical current, exposure to temperature changes or exposure to chemicals. While performing the duties of this job, the employee may be exposed to fumes, airborne particles, odors, dust, mists, and gases. The noise level in the work environment can be loud. 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; visual inspection involving small defects, small parts, and/or operation of machines (including inspection); using measurement devices; and/or assembly or fabrication parts at distances close to the eyes. Machinery operation requires the use of safety equipment to include but not limited to eye safety glasses, hearing protectors, work boots, and lab coats. May be required to exert up to 50 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.

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About the role

December 10, 2025

Full Time

Company

December 12, 2025

On-site

Eos Energy Enterprises

  •  East Pittsburgh, Pennsylvania, United States

5+ years

UTC-05:00

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