Senior Buyer

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 Senior Buyer is responsible for end-to-end procurement execution for BESS projects. 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 Responsibilities

• Manage RFQs and RFPs.
• Build and maintain strong relationships with OEMs and integrators. 
• Coordinate with engineering teams to align procurement activities with technical requirements.
• 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 the supplier landscape.
• Proactively manage delivery schedules, expediting, changes, and recovery plans.

Key Skills & Competencies:

• 3-5 years of experience in procurement, sourcing, or supply chain roles.
• Experience in renewable energy, power infrastructure, or energy storage.
• Strong preference for BESS or power equipment procurement experience.
• Proven negotiation and supplier management skills.
• Experience with project-based procurement.
• Strong analytical skills and attention to detail.
• Ability to work comfortably in a fast-paced, growing organization.
• Proficiency in Excel and ERP / procurement tools.

Preferred Qualifications:

• 3-5 years of procurement experience in the energy or infrastructure sector.
• Bachelor's degree in engineering, Supply Chain, Business, or a related field.
• Experience with utility-scale or C&I energy projects.
• Familiarity with UL, IEC, and IEEE standards applicable to BESS equipment.

Why Join ON.energy

• Be part of a company driving the global energy transition.
• Work hands-on with cutting-edge BESS technology.
• High-visibility role with direct impact on project success.
• Entrepreneurial environment with opportunities for growth and ownership.

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.