Senior Project Engineer - BESS at ON.energy

<div class="content-intro"><p>ON.energy is building the power infrastructure that makes the AI era possible. As AI demand surges past what the grid and traditional data centers can support, ON.energy provides a new class of power technology proven at gigawatt scale and trusted by the world’s leading cloud and AI companies. Our systems are already deployed across 2.5 GW of hyper-scale campuses, validated by top U.S. national labs, and certified for grid-safe operation by major utilities. With real products in the field, we’re scaling faster than the grid can, transforming power from a bottleneck into a competitive advantage for the companies building the future.</p></div><h3>Location: Remote considered / Houston, TX or McLean, VA preferred</h3> <h3>Travel: to project sites across the US, usually up to 30%, but occasionally 50%</h3> <h3>Overview</h3> <ul> <li> <div>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.</div> </li> <li> <div>Coordinate with internal engineering, procurement, and construction teams to ensure project milestones are met.</div> </li> <li> <div>Collaborate with customers, EPC contractors, OEMs, and design consultants on integration of BESS with data center electrical infrastructure.</div> </li> <li> <div>Review and validate system designs (electrical, civil, mechanical) and vendor submittals to ensure technical compliance and quality.</div> </li> <li> <div>Design and develop Single line diagrams, Schematics, Wiring diagrams for Battery storage systems</div> </li> <li> <div>Prepare Electrical Equipment Specifications, Data Sheets, Purchase Requisitions and Bid evaluations for inverters, Switchgear, Transformers and other electrical equipment as required</div> </li> <li> <div>Develop Short circuit, load flow, and arc flash studies using software such as ETAP.</div> </li> <li> <div>Assist in developing project schedules, procurement plans, and technical documentation.</div> </li> <li> <div>Conduct site walks and support field activities during installation and commissioning.</div> </li> <li> <div>Participate in Factory and Site Acceptance Testing (FAT/SAT) of BESS components and systems.</div> </li> <li> <div>Identify technical risks and propose mitigation strategies in coordination with Project Management.</div> </li> <li> <div>Ensure all work is compliant with relevant codes (e.g., NEC, IEEE, NFPA) and On Energy Storage’s internal standards.</div> </li> </ul> <div>Required Qualifications</div> <div> <ul> <li>Bachelor’s degree in Electrical Engineering, Mechanical Engineering, or other engineering discipline.</li> <li>5+ years of experience in project engineering, preferably within the BESS, electrical infrastructure, or data center sectors.</li> <li>Familiarity with energy storage systems (CATL, Sungrow, Tesla, etc.) and high-voltage infrastructure.</li> <li>Strong understanding of electrical schematics, single-line diagrams, and equipment layouts.</li> <li>Strong understanding of the electrical system design, system studies, relay coordination, and protection &amp; control.</li> <li>Proficiency in Microsoft Office, AutoCAD, power system study programs (Ex. ETAP, SKM).</li> <li>Basic understanding of Civil, Mechanical, and Structural work.</li> <li>Ability to read and understand project owner specifications and engineering drawings</li> <li>Ability to manage subcontractors and drive schedule of Engineering activities</li> <li>Ability to manage multiple projects concurrently</li> <li>Ability to problem solve issues and have an “outside the box” mentality</li> <li>Strong attention to detail, with the ability to recognize discrepancies</li> <li>Able to produce clear and concise documentation</li> <li>Strong work ethic</li> <li>Excellent interpersonal skills with the ability to work with clients and staff in a team.</li> <li>Excellent communication, problem-solving, and cross-functional coordination skills.</li> <li>Ability to travel to project sites across the U.S. as needed (up to 50%).</li> </ul> </div> <div>Preferred Qualifications</div> <ul> <li> <div>Experience working on EPC or design-build projects in the energy or critical infrastructure sector in North America.</div> </li> <li> <div>Familiarity with commissioning protocols and QA/QC procedures for electrical systems.</div> </li> <li> <div>PE or EIT certification is a plus.</div> </li> <li>Hybrid in office up to 3 days a week</li> </ul><div class="content-conclusion"><hr> <p><strong>For US-based roles - What you’ll get:</strong></p> <ul> <li>Competitive salary + annual performance-based bonus eligibility</li> <li>Medical, dental, and vision insurance</li> <li>401(k) with company match</li> <li>Paid time off and company holidays&nbsp;</li> </ul> <p><strong>For Mexico-based roles - What you’ll get:</strong></p> <ul> <li>Competitive salary + annual performance bonus eligibility</li> <li>Christmas Bonus (Aguinaldo): 30 days</li> <li>Major medical expenses and life insurance</li> <li>Paid time off and holidays (per local policy)</li> </ul> <p><strong>For all roles:</strong></p> <ul> <li>Professional development and growth opportunities</li> <li>Opportunity to grow with a mission-driven team shaping the future of clean energy</li> <li>Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation.</li> <li>Accommodations: If you need an accommodation during the application process, email <a href="mailto:[email protected]">[email protected]</a></li> <li>Benefits vary by role and location and are subject to change.</li> </ul></div>