Buyer, Ingeniería

Location: Ciudad Nezahualcoyotl

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.

Role Description
The Buyer – Auxiliary Power & Electrical Systems is responsible for sourcing and procuring auxiliary power equipment and LV electrical systems for BESS projects, working closely with electrical, control, and power electronics teams. This role is execution-focused, emphasizing disciplined delivery against project schedules and specifications. Category strategy and long-term supplier positioning are led by Sourcing / Category Managers.
Key Responsibilitie   s
Lead procurement for BESS projects, auxiliary systems. Manage RFQs/RFPs.
Build and maintain strong relationships with OEMs, integrators.
Coordinate with engineering to align procurement with technical specifications.
Support project cost estimates and budgets during development and execution phases.
Monitor supplier performance, lead times, and supply chain risks.
Track market trends in battery technology, pricing, and supplier landscape.
Ensure compliance with ON.energy’s procurement policies and project requirements.
Proactively manage delivery schedules, expediting, changes, and recovery plans.

Key Skills & Competencies
2–3 years of experience in procurement or sourcing roles.
Hands-on experience sourcing auxiliary power or low-voltage (LV) electrical equipment.
Familiarity with UPS systems, DC systems, and backup power architectures.
Ability to read and work with electrical schematics, bills of materials (BOMs), and technical documentation.
Strong coordination, analytical, and communication skills.
Proficiency in Excel and ERP / procurement tools.
Working knowledge of IEC and UL standards for auxiliary power systems.
Bachelor’s degree in Electrical engineering, Power Electronics, Supply Chain, or Business.

Why Join ON.energy
Ownership of a specialized and critical procurement category. Close collaboration with engineering teams on high-reliability power systems. Clear development path toward Senior Buyer or Category Manager roles. Direct impact on the reliability and safety of energy storage assets.
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 re
Benefits vary by role and location and are subject to change.