Senior Mechanical Engineering Manager

ON.energy; Houston (TX); On-site; USD 150,000 - 190,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

401(k) with company match

Paid time off

Company holidays

Job summary

ON.energy is seeking a Senior Mechanical Engineering Manager to lead structural analysis and validation for energy infrastructure products. You will ensure the structural integrity and thermal performance of enclosures, and safety under static and dynamic conditions, interfacing with project teams, commissioning, and O&M staff.

The role requires 15+ years of hands-on experience, FE A leadership, and collaboration across BESS, power electronics, and controls groups.

Qualifications

• Bachelor’s degree in Mechanical Engineering or related field.
• 15+ years of hands-on structural and mechanical engineering experience in project-based or industrial settings.
• Experience with stress and fatigue analysis, and vibration assessment.
• Ability to interpret engineering drawings and develop detailed reports.
• Experience validating mechanical systems for energy infrastructure.

Responsibilities

• Perform structural stress and fatigue analysis for assemblies and enclosures.
• Lead and review FEA models to validate designs under loads.
• Ensure safety under operational, transportation, vibration, and environmental loads.
• Collaborate with cross-functional teams (BESS, Power Electronics, Controls).
• Develop mechanical documentation including calculations, specs, and drawings.
• Travel up to 20% for FAT inspections and site commissioning.
• Contribute to HVAC/thermal design of enclosures.

Skills

Structural analysis

FEA

Thermal design

Mechanical design leadership

Documentation

Communication

Travel readiness

Education

Bachelor's degree in Mechanical Engineering

Tools

ANSYS

SolidWorks

MATLAB

Job description

ON.energyis 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. ON recently announced a 5GW partnership, with 3GW currently under construction across multiple hyperscale data center campuses. With patented technology and proprietary software,ON.energydevelops projects worldwide that set new benchmarks for resilience.

We are seeking a Senior Mechanical Engineering Manager with strong experience instructural analysis and mechanical systems validation to lead the mechanical design activities for the products deployed for our energy infrastructure and mission-critical projects. This isa product focused role—we need someone who can speak fluently about ensuring the structural integrity, mechanical reliability, safety and validate the thermal performance of equipment and supporting structures under static and dynamic operating conditions, ideally have experience with mission critical applications, and interface with project, commissioning and O&M engineering teams.

Key Responsibilities:

• Perform structural stress and fatigue analysis for mechanical assemblies, enclosures, and supporting infrastructure used in ON.energy’s product offering.
• Lead and/or review Finite Element Analysis (FEA) models or reports to validate mechanical designs under static, dynamic, thermal, and seismic loading conditions.
• Ensure mechanical and structural safety under operational loads, transportation loads, vibration, and environmental conditions.
• Evaluate failure modes and recommend design improvements to enhance durability, reliability, and lifecycle performance.
• Collaborate with BESS, Power Electronics and Controls teams to ensure integrated system performance.
• Support development and review of mechanical documentation including calculations, reports, specifications, and as-built drawings.
• Experience designing heating, ventilation, and air-conditioning (HVAC) systems. Overall have experience with thermal design of enclosures e.g. calculations of HVAC, identification of temperature limits, humidity management and mitigation.
• Participate in product design sprints with the development team.
• Provide technical input during product design iterations based on lessons learned from project engineering design, installation, commissioning, and operations.
• Excellent communication skills across technical and non-technical teams.
• Willing to travel up to 20% for product FAT inspection and site commissioning witnessing.

Required Skills & Experience

• Bachelor’s degree in Mechanical Engineering or similar technical field.
• 15+ yearsof hands-on structural and mechanical engineering experience in project-based or industrial settings.
• Strong experience performing stress analysis, fatigue analysis, and vibration assessment.
• Demonstrated experience ensuring structural safety and compliance with applicable engineering standards and codes.
• Ability to interpret engineering drawings and develop detailed reports and calculations.

Preferred Experience:

• Experience withPower Electronics, UPS/mission critical applications or utility-scale infrastructure where mechanical system are applied.
• Panel building mechanical design experience for power and controls/IT equipment.

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
• 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 [e-mail]
• Benefits vary by role and location and are subject to change.