Jr. Project Engineer – Battery Energy Storage Systems (BESS) at ON.energy

Miami, Florida, United States -

Full Time

Start Date

Immediate

Expiry Date

11 May, 26

Salary

0.0

Posted On

11 Feb, 26

Experience

0 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

BESS Project Execution, Technical Coordination, Design Validation, Electrical Drawings, Single-Line Diagrams, Equipment Specification, System Studies, ETAP, SKM, Procurement Planning, Site Walks, Commissioning, FAT/SAT, Risk Mitigation, Code Compliance, High-Voltage Infrastructure

Industry

Energy Technology

Description

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. Position Summary The Jr. Project Engineer will support the engineering execution of Battery Energy Storage System (BESS) projects for data centers, from initial development through commissioning. This role involves technical coordination, design validation, and collaboration with internal teams and external stakeholders to ensure successful project delivery. Location This is a hybrid role located in Houston, TX or Reston, VA or Alpharetta, GA or Miami, FL Key Responsibilities Assist in the end-to-end execution of BESS projects, including design, procurement, installation, and commissioning. Serve as a technical resource for project managers and coordinate with engineering, procurement, and construction teams to meet project milestones. Collaborate with customers, EPC contractors, OEMs, and consultants to integrate BESS into data center electrical infrastructure. Review and validate system designs (electrical, civil, mechanical) and vendor submittals for compliance and quality. Develop electrical drawings such as single-line diagrams, schematics, and wiring diagrams for battery storage systems. Prepare equipment specifications, data sheets, purchase requisitions, and bid evaluations for electrical components (inverters, switchgear, transformers, etc.). Perform system studies (short circuit, load flow, arc flash) using software tools like ETAP or SKM. Support project scheduling, procurement planning, and technical documentation. Participate in site walks, installation support, and commissioning activities. Assist with Factory and Site Acceptance Testing (FAT/SAT) of BESS components. Identify technical risks and propose mitigation strategies in coordination with project management. Ensure compliance with relevant codes (NEC, IEEE, NFPA) and company standards. Qualifications Bachelor’s degree in Electrical Engineering, or a related field. 0–3 years of engineering experience (internships or co-op experience acceptable). Familiarity with energy storage systems (e.g., CATL, Sungrow, Tesla) and high-voltage infrastructure preferred. Understanding of electrical schematics and system design fundamentals. Proficiency in Microsoft Office; basic knowledge of AutoCAD and power system analysis tools (ETAP, SKM). Ability to read and interpret engineering drawings and specifications. Willingness to travel up to 30% for project site visits. Preferred Skills Basic understanding of civil, mechanical, and structural aspects of projects. Strong problem-solving skills and ability to think creatively. Excellent attention to detail and documentation skills. Effective communication and teamwork abilities. 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. Accommodations: If you need an accommodation during the application process, email recruitment@onenergystorage.com Benefits vary by role and location and are subject to change.

Responsibilities

The Jr. Project Engineer will support the engineering execution of Battery Energy Storage System (BESS) projects for data centers, spanning from initial development through commissioning. This involves technical coordination, design validation, and collaboration with internal and external parties to ensure successful project delivery.