Tax Manager

Requirements

• 5+ years of tax experience; minimum 1 year in a manager or senior role.
• Bachelor's degree in Accounting, Finance, or related field required; Master's in Taxation or JD/LLM preferred.
• Certification CPA or Enrolled Agent required (active license).
• Direct experience with §48, §48E, §6418, PWA, and/or Domestic Content rules strongly preferred.
• Demonstrated experience managing multi-state compliance including sales & use, property tax, and franchise taxes.
• Proficiency in Excel (advanced); experience with tax compliance software and ERP systems.
• Prior experience supervising or mentoring junior tax staff required
• 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.

Benefits

Additional Information

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. POSITION OVERVIEW The Tax Manager is responsible for overseeing and managing all aspects of tax compliance, reporting, and planning for ON.energy and all its related entities. This role leads the tax function end-to-end - from federal and multi-state filings to ITC monetization strategy - and directly supervises the Tax Analyst. The Tax Manager operates as a strategic partner to the Tax Director, CFO, and Finance team, ensuring the company remains fully compliant while optimizing tax positions across a growing portfolio of clean energy projects. CORE RESPONSABILITIES Manage all federal, state, and local tax compliance obligations across ON.energy and its related entities, including income, franchise, sales & use, property, and transaction privilege taxes, ensuring zero late filings. Lead all §48E ITC workstreams, including safe harbor strategy, PWA and Domestic Content compliance, FEOC certification, and credit monetization via §6418 transfers. Develop federal income tax projections and advise on structuring, planning, and M&A transactions; monitor legislative and regulatory developments. Supervise, coach, and develop the Tax Analyst; build scalable processes and SOPs to support a growing portfolio. Serve as the primary tax point of contact across Finance, Legal, and Project Development, and support the Tax Director with reporting, forecasting, and strategic presentations. Coordinate with external tax advisors and legal counsel on complex matters, audits, and tax opinions.

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