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.
Chief Mechanical Engineer
Role Overview
The Chief Mechanical Engineer serves as a senior technical advisor and Subject Matter Expert (SME) for ON.Energy’s mechanical systems. This role provides high-level engineering support for critical field issues and serves as a key technical consultant during product design phase and when modification is needed. You will act as a bridge between design theory and real-world operational performance, ensuring hardware reliability through data-driven analysis and expert review.
Key Responsibilities
- High-Level Technical Support & Escalation
- Field Technical Support: Serve as the senior technical point of contact for complex or unresolved mechanical issues at project sites, from equipment arrival through the decommissioning phase.
- Root Cause Analysis: Provide expert oversight and direction for failure investigations, ensuring modifications are technically sound and address the core issue.
- SME Consultation: Act as a "Level 2" support resource for sales engineering, providing technical validation for non-standard site requirements or client-specific mechanical requests.
- Design Advisory & Gate Reviews
- Technical Reviews: Participate as a Subject Matter Expert in Design Reviews and Stage-Gate Reviews, identifying potential mechanical risks before they reach the field.
- Product Modification: Provide technical guidance on hardware updates or modifications based on field performance data and evolving safety standards.
- Requirement Support: Assist the product team in defining mechanical requirements for new hardware, ensuring they are grounded in realistic engineering constraints.
- Simulation & Validation
- Advanced Analysis: Perform or oversee FEA and CFD simulations to validate thermal management strategies and structural integrity.
- Thermal Performance: Ensure cooling/heating systems are optimized for various environmental conditions, providing simulation-backed recommendations for hardware improvements.
- Environmental Resilience: Ensure all mechanical designs and site-specific deployments are validated against extreme site conditions, including:
- Seismic Activity: Ensuring structural anchorage and internal component stability in various seismic zones.
- Snow & Wind Loads: Validating roof integrity and enclosure stability against local building codes.
- Corrosion & Ingress: Overseeing protection strategies for high-humidity or coastal (saline) environments.
Required Qualifications
- 20+ years of mechanical engineering experience, specifically within Battery energy storage, Medium Voltage UPS, Power conversion, power generation, or similar industrial equipment.
- Expertise in FEA/CFD: Hands-on experience or knowledge with simulation tools (e.g., SolidWorks Simulation, or ANSYS) to solve thermal and structural challenges.
- Strategic Problem Solver: Proven ability to diagnose complex mechanical failures in the field and translate them into design improvements.
- Communication: Ability to communicate technical risks clearly to both internal stakeholders and external clients.
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 [email protected]
- Benefits vary by role and location and are subject to change.
Top Skills
What We Do
ON.energy is building the backbone of energy and AI infrastructure, powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resilience challenges, delivering custom solutions for AI data centers, mission-critical facilities, and front-of-the-meter assets. Its track record spans industrial, manufacturing, infrastructure, transportation, and grid-scale storage. With patented technology and proprietary software, ON.energy develops projects worldwide that set new benchmarks for resilience.
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