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Tax Manager

Miami, Florida, United States

ON.energy is building the backbone of energy and AI infrastructure powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resilience challenges, delivering custom solutions for AI data centers, mission-critical facilities, and front-of-the-meter assets. ON recently announced a 5GW partnership, with 3GW currently under construction across multiple hyperscale data center campuses. With patented technology and proprietary software, ON.energy develops projects worldwide that set new benchmarks for resilience.

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.

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.

Agency Notice: ON.energy does not accept unsolicited resumes from staffing agencies, search firms, or third-party recruiters. Resumes submitted without a fully executed Master Services Agreement (MSA) and a written request from an authorized member of our Talent Acquisition team will be considered the property of ON.energy. No placement fees or compensation will be paid for unsolicited candidate submissions.

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