Project Engineer - BESS

• 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 Requisitions 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.

Qualifications

• 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%).

Preferred Qualifications

• 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.