Assistant Controller

At Arbor Energy & Resources Corporation ("Arbor Energy"), we’re creating technology to power our lives while protecting the planet that sustains them. Our advanced power systems deliver clean, reliable baseload electricity with zero operating emissions—modular, fuel-flexible, and engineered for the realities of today’s energy demand. At the core is a supercritical CO₂ turbine with integrated carbon capture, designed to bring carbon-neutral power online quickly at meaningful scale.

Our team includes aerospace engineers, combustion experts, and systems thinkers with a shared goal: to build technology worthy of the world we want to live in. While many of us began our journeys looking to the stars, we’re applying that expertise here at home to deliver dependable, emission-free baseload power and a future of lasting abundance.

If you share our values and are drawn to rigorous work with lasting impact, we’d love to learn more about you. Come build what the future will run on.

Steward our planet
:
We build for tomorrow, ensuring every bolt we tighten and every hand we lend leaves our environment stronger than we found it.

Lead with Love
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We champion the success of our people, partners, and planet, nurturing excellence through camaraderie and rigor.

Explore the Uncharted
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We embrace the unknown with curiosity, using courage and discipline to transform uncertainty into opportunity.

As Assistant Controller at Arbor Energy, you’ll be the first team member reporting to the Controller and the person who answers one question every day: are the books right? You’ll own day-to-day accounting from end to end, including the close, the general ledger, state and federal grant compliance, and the work of our outsourced accounting partner.

Arbor is moving from R&D toward commercial manufacturing and project deployment. You’ll help build the accounting that goes with that move, including a new ERP, manufacturing cost accounting, and multi-year equipment commitments. As the team grows, this role is the path to Controller.

This is an in-person opportunity in our El Segundo, CA headquarters.

Own the close and financial reporting

• Own the monthly, quarterly, and year-end close, including the close calendar, journal entries, accruals, prepaids, and account reconciliations.
• Prepare board-ready financial statements (income statement, balance sheet, and cash flow statement) in accordance with US GAAP for Controller review.
• Produce budget vs. actual and flux reports on schedule, and explain the drivers clearly to non-finance leaders.
• Maintain the general ledger and chart of accounts, including department, project, and award tracking.

Own state and federal grant accounting

• Own financial compliance for Arbor’s state and federal awards, including DOE financial assistance awards and SBIR grants.
• Track allowable and unallowable costs by award under 2 CFR 200, 2 CFR 910, and FAR Part 31.
• Prepare drawdowns and reimbursement requests, federal financial reports (SF-425), and cost-share tracking.
• Build and run timekeeping and labor-charging processes that hold up to agency review.
• Support indirect cost rates and rate proposals, working with outside specialists as needed.
• Coordinate with external auditors and agencies on grant audits and reviews, and run award closeouts.

Manage our outsourced accounting partner

• Manage the daily work of our outsourced accounting partner, including an offshore team that supports payroll, AP, and the close.
• Set standards, review deliverables, and track the partner’s quality and timeliness against agreed expectations.
• Bring work in-house or automate it when that is faster or more accurate.

Run AP, vendor commitments, and AR

• Own AP, including high-volume invoice processing and the weekly pay…