Project Engineer - BESS

Location

Remote considered / Houston, TX or Mclean, VA preferred.

Up to 30% to project sites across the US, occasionally 50%.

• Support the end-to-end engineering execution of BESS projects for data centers, from development to commissioning.
• Manage the technical scope of projects and serve as the technical point of contract to the project manager.
• Coordinate with internal engineering, procurement, and construction teams to ensure project milestones are met.
• Collaborate with customers, EPC contractors, OEMs, and design consultants on integration of BESS with data center electrical infrastructure.
• Review and validate system designs (electrical, civil, mechanical) and vendor submittals to ensure technical compliance and quality.
• Design and develop Single line diagrams, Schematics, Wiring diagrams for Battery storage systems
• Prepare Electrical Equipment Specifications, Data Sheets, Purchase Requisition s and Bid evaluations for inverters, Switchgear, Transformers and other electrical equipment as required
• Develop Short circuit, load flow, and arc flash studies using software such as ETAP.
• Assist in developing project schedules, procurement plans, and technical documentation.
• Conduct site walks and support field activities during installation and commissioning.
• Participate in Factory and Site Acceptance Testing (FAT/SAT) of BESS components and systems.
• Identify technical risks and propose mitigation strategies in coordination with Project Management.
• Ensure all work is compliant with relevant codes (e.g., NEC, IEEE, NFPA) and On Energy Storage’s internal standards.

• Bachelor’s degree in Electrical Engineering, Mechanical Engineering, or other engineering discipline.
• 3+ years of experience in project engineering, preferably within the BESS, electrical infrastructure, or data center sectors.
• Familiarity with energy storage systems (CATL, Sungrow, Tesla, etc.) and high-voltage infrastructure.
• Strong understanding of electrical schematics, single-line diagrams, and equipment layouts.
• Strong understanding of the electrical system design, system studies, relay coordination, and protection & control.
• Proficiency in Microsoft Office, AutoCAD, power system study programs (Ex. ETAP, SKM).
• Basic understanding of Civil, Mechanical, and Structural work.
• Ability to read and understand project owner specifications and engineering drawings.
• Ability to manage subcontractors and drive schedule of Engineering activities.
• Ability to manage multiple projects concurrently.
• Ability to problem solve issues and have an “outside the box” mentality.
• Strong attention to detail, with the ability to recognize discrepancies.
• Able to produce clear and concise documentation.
• Strong work ethic.
• Excellent interpersonal skills with the ability to work with clients and staff in a team.
• Excellent communication, problem-solving, and cross-functional coordination skills.
• Ability to travel to project sites across the U.S. as needed (up to 50%).

• Experience working on EPC or design-build projects in the energy or critical infrastructure sector in North America.
• Familiarity with commissioning protocols and QA/QC procedures for electrical systems.
• PE or EIT certification is a plus.
• Hybrid in Houston or Mclean office 3 days a week.

• Competitive salary + annual performance-based bonus eligibility
• Medical, dental, and vision insurance
• 401(k) with company match
• Paid time off and company holidays

• Competitive salary + annual performance bonus eligibility
• Major medical expenses and life insurance
• Paid time off and holidays (per local policy)

• Professional development and growth opportunities
• Opportunity to grow with a mission-driven team shaping the future of clean energy
• Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation.
• Benefits vary by role and location and are subject to change.