Project Engineer - BESS

ON.energy is setting the standard for large load interconnection. ON’s patented AI UPS™ is a medium-voltage UPS that serves as a firewall, protecting the data center from the grid, and the grid from the data center. With multiple gigawatts currently under construction, we are enabling grid-safe data centers.

Location: Remote considered / Hybrid in Houston, TX or Tysons, VA preferred

Travel: 20-30% travel to project sites in the US

Overview

• 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.

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For US-based roles - What you’ll get:

• Competitive salary + annual performance-based bonus eligibility

• Medical, dental, and vision insurance

• 401(k) with company match

• Paid time off and company holidays

For Mexico-based roles - What you’ll get:

• Competitive salary + annual performance bonus eligibility

• Christmas Bonus (Aguinaldo): 30 days

• Major medical expenses and life insurance

• Paid time off and holidays (per local policy)

For all roles:

• 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.

Agency Notice: ON.energy does not accept unsolicited resumes from staffing agencies, search firms, or third-party recruiters. Resumes submitted without a fully executed Master Services Agreement (MSA) and a written request from an authorized member of our Talent Acquisition team will be considered the property of ON.energy. No placement fees or compensation will be paid for unsolicited candidate submissions.