Corporate Accounts Manager

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.

Department:  Corporate Accounts

Reports to:  Head of Corporate Finance

Location:  Miami, FL · Houston, TX · or Tysons, VA

Employment type:  Full-time

About the Role

We build and deploy AI UPS systems at the scale of major infrastructure — the power backbone that keeps the next generation of computing running. Projects like ours are won and lost on execution, and execution is the sum of thousands of small moments: a card that works the first time, a ride that’s already arranged, an expense that clears without a second thought. Every point of friction pulls time and focus away from the work that matters, and this role exists to remove it. As Manager, Corporate Accounts, you’ll own the corporate spend accounts and vendor relationships that keep our teams moving — anchored by our RAMP corporate card program, the foundation of the role — and you’ll proactively bring on new platforms and relationships the moment they’ll make life easier for the team.

The role has two equally important sides. One is rigor — tight spend controls, clean reconciliation, real-time visibility, and audit-ready records, because accounts at our scale demand it. The other is experience — anticipating what our people need before they have to chase it, and making every transaction, trip, and reimbursement effortless. You won’t own software systems (that’s IT) or employee benefits (that’s HR); you’ll own everything in between — the accounts and relationships that cost real money, demand active management, and directly determine whether our teams can move at the speed our projects require.

Key Responsibilities

Spend & Card Program Manager

• Serve as the owner of the RAMP corporate card platform, managing the process of: deactivation of cards, card policies, category controls, approvals, etc.
• Monitor transactions in real time, enforce spend policy, and investigate exceptions, misuse, or out-of-policy activity.

Vendor & Account Relationship Management

• Manage the relationship, contracts, and renewals for the company’s corporate accounts, including corporate travel platforms, hotel and airline programs, ground transportation and rental car accounts, procurement marketplaces (e.g., Amazon Business), shipping/courier accounts, and food/catering platforms.
• Negotiate rates, terms, and service levels; consolidate vendors and eliminate redundant or underused accounts.
• Serve as the internal point of contact and escalation path for issues across these accounts.

Audit, Compliance & Controls

• Maintain an accurate register of all accounts under management — owner, access list, renewal date, spend approver, and audit cadence.
• Conduct regular access reviews and usage audits to ensure controls are followed and spend is justified.
• Partner with Finance and Internal Audit on policy adherence, documentation, and audit readiness.

Reporting & Cost Optimization

• Produce regular reporting on spend, usage, and savings across the account portfolio.
• Identify cost-savings and consolidation opportunities; track and report realized savings.
• Capture and apply program benefits to the company’s advantage (e.g., loyalty points, volume discounts, negotiated rates).

Employee Experience

• Design and continuously improve the employee-facing side of these programs — onboarding to RAMP, travel booking, ground transportation, meals, and related services — so they are intuitive, fast, and well-supported.
• Gather employee feedback and use it to refine policies, vendors, and processes.
• Manage workplace experience accounts that fall within scope (e.g., catering, branded merchandise, recognition/gifting, events), in coordination with HR where boundaries overlap.

Required Qualifications

• Hands-on administrator experience with the RAMP platform is required (card issuance, controls, approval workflows, reconciliation, and reporting).
• 5+ years of experience in corporate services, finance/spend operations, procurement, or a closely related field.
• Demonstrated ownership of corporate card and/or expense programs at scale.
• Strong understanding of spend controls, financial reconciliation, and audit/compliance practices.
• Proven vendor and contract management experience, including negotiation.
• Excellent organizational skills and high attention to detail with sensitive financial data.

Preferred Qualifications

• Experience administering corporate travel and ground-transportation accounts (e.g., Navan, Concur, TravelPerk).
• Experience at a large or fast-scaling organization.
• Familiarity with procurement platforms (Amazon Business) and accounting systems (NetSuite, QuickBooks, etc.).
• A track record of improving employee-facing processes or service experience.

Skills & Competencies

• Bias toward both control and service — able to enforce policy without creating friction.
• Strong analytical and reporting skills.
• Clear communicator who can work across Finance, HR, IT, and leadership.
• Discreet and trustworthy with confidential spend and personnel-adjacent information.

Success in This Role Looks Like

• A clean, fully documented register of all in-scope accounts with current owners, access, and audit cadence.
• RAMP program running with strong controls, fast reconciliation, and minimal out-of-policy spend.
• The RAMP program is automated end-to-end — card issuance, approvals, policy controls, and deactivation run with minimal manual intervention.
• Measurable cost savings and consolidation across the account portfolio.
• Positive employee feedback on travel, expense, and workplace-services experiences.

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.