Sourcing Manager - Transformers
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.
Supply Chain Manager – Transformers
The Supply Chain Sourcing Manager – Transformers is responsible for planning, sourcing, purchasing, logistics, and supplier management across transformer and substation equipment. This role focuses on power transformers, distribution transformers, auxiliary transformers, and associated balance-of-system components to ensure on-time, cost-effective, and high-quality delivery of materials and services.
The role partners closely with Engineering, Operations, Finance, and Quality to align supply chain strategy with business objectives and support safe, reliable, and scalable energy infrastructure deployments.
Category-Specific Responsibilities – Transformers
Source and manage procurement of power transformers, distribution transformers, pad-mounted units, and related substation equipment.
Oversee technical specifications for transformer systems, including:
Voltage ratings, MVA capacity, and impedance characteristics
Cooling systems (ONAN, ONAF, OFAF, etc.)
Insulation systems and dielectric performance
Losses (no-load and load losses) and efficiency requirements
Protection, monitoring, and control systems
Partner with Engineering on:
Transformer sizing and specification development
Substation design and system integration
Grid interconnection requirements and utility standards
Protection schemes and relay coordination
SCADA and communication protocols
Negotiate supply agreements to include pricing, warranties, performance guarantees, spare parts, and long-term service agreements (LTSA).
Strategic Sourcing & Procurement
Develop and execute sourcing strategies for transformers and electrical infrastructure components.
Lead supplier selection, qualification, RFQs/RFPs, negotiations, and contracting.
Manage commercial terms, pricing structures, delivery schedules, and escalation clauses.
Drive cost optimization through multi-sourcing, should-cost modeling, and total cost of ownership (TCO) analysis.
Supplier Relationship Management
Build and maintain strong relationships with transformer OEMs, EPC partners, and key component suppliers.
Conduct supplier performance reviews across quality, delivery, cost, and technical responsiveness.
Lead supplier corrective actions, risk mitigation efforts, and continuous improvement initiatives.
Cross-Functional Collaboration
Work with Engineering on specifications, equipment selection, and change management.
Partner with Operations to support project execution, installation, and commissioning.
Align with Finance on budgeting, cost tracking, and savings initiatives.
Support Quality in NCR resolution, failure analysis, and supplier audits.
Continuous Improvement & Risk Management
Monitor market trends in transformer manufacturing, raw materials (e.g., copper, steel), and supply chain constraints.
Identify and mitigate risks related to long lead times, manufacturing capacity, geopolitical factors, and evolving grid standards.
Implement process improvements to streamline procurement and improve scalability.
Develop contingency plans for supply disruptions, quality issues, or performance risks.
Qualifications
Bachelor’s degree in Supply Chain, Business, Engineering, or related field.
10+ years of supply chain or procurement experience, with 5+ years of transformer, substation, or power systems experience strongly preferred.
Strong understanding of transformer technologies, grid infrastructure, and industry standards (IEEE, IEC).
Proven negotiation, analytical, and contract management skills.
Excellent communication and cross-functional stakeholder management skills.
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.