Senior Buyer

On.Energy

Experience: 3+ yrs
Location: Miami, Florida, United States
Job type: Full-time

Required skills

Excel
ERP tools
Procurement software

About the role

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.

About On.Energy

Providing AI-ready power infrastructure and utility-scale energy storage systems.

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