Accounts Receivable Manager

About this role

The Nuclear Company is the fastest growing AI tech-enabled startup in the nuclear and energy space, pioneering a fleet-scale approach to building the next generation of nuclear reactors. Through our design-once, build-many model, we're accelerating the deployment of safe, reliable, and affordable nuclear energy.

We operate with an AI-first mindset. Every employee is expected to leverage AI, technology, and the Nuclear Operating System (NOS) as integral components of their role to improve the quality, speed, and impact of their work. We expect every team member to continuously identify opportunities to automate workflows, enhance decision-making, improve processes, and contribute to the ongoing evolution of NOS as a strategic operating capability that enables The Nuclear Company to scale with excellence.

We hire people who are driven by purpose, thrive in ambiguity, and are energized by building what has never been built before. Our team combines intellectual curiosity with high agency, embraces candid feedback and continuous learning, and holds themselves and others to exceptional standards. Our values— Transparency, Responsibility, Unity, Scrappiness, and Tenacity —guide how we hire, collaborate, and make decisions every day. They are not words on a wall; they are the standard by which we operate. TRUST is the foundation of our safety culture, fostering intellectual honesty, accountability, and open communication, while our values challenge every team member to execute with urgency, humility, resilience, and an unwavering commitment to our mission.

About the role

The Accounts Receivable Manager will play a critical, hands-on role in building and running the company’s billing and receivables operations as The Nuclear Company continues to grow. The company’s receivables profile is low-volume and high-complexity contract-governed services billings, joint venture cost reimbursements and fees, and intercompany settlements, so this role centers on billing accuracy, contract-to-cash discipline, and cash visibility rather than high-volume collections.

As the first dedicated AR resource, this position will design the billing architecture and own customer invoicing, cash application, unbilled receivables tracking, reconciliations, and AR close and reporting. As revenue streams expand and contract complexity increases, this individual will build the receivables processes, controls, and automation required to keep pace without proportional headcount growth.

Note: This is a hybrid position based in our downtown Columbia, South Carolina office. The role has been posted in Charlotte and surrounding markets for visibility, as the hybrid schedule may make the commute workable for candidates living outside the immediate Columbia area. Candidates should be within commuting distance of Columbia or open to relocation.

Role Responsibilities

• Billing & Contract-to-Cash: Own customer invoicing end to end, ensuring invoices are accurate and issued in accordance with contract terms—including milestone, time-and-materials, and cost-reimbursable structures—and that billing requirements are captured at contract signing in partnership with Legal and Business Development.

• Accounts Receivable Operations: Manage cash application, account reconciliation, credit adjustments, and resolution of billing discrepancies across a multi-entity structure, ensuring accuracy and timely execution.

• Intercompany & Joint Venture Billing: Prepare and manage cost reimbursement, fee, and intercompany billings arising from the company’s joint venture and multi-entity structure, including settlement tracking and supporting documentation.

• Unbilled Receivables & Revenue Coordination: Track unbilled receivables and contract assets, and coordinate with Technical Accounting to ensure billing aligns with revenue recognition (ASC 606) treatment.

• Collections & Aging Management: Monitor aging and outstanding balances, resolve the documentation, certification, and contract issues that hold up payment, and escalate issues or trends that could impact cash flow.

• Cash Flow & AR Reporting: Maintain accurate reporting and visibility into receivables, unbilled balances, aging, and expected cash inflows, feeding Treasury’s cash forecasting and providing meaningful insight to Accounting, Finance, and business leadership.

• Month-End & Year-End Close: Own AR-related close activities, including account reconciliations, adjustments, intercompany settlement support, and supporting schedules required for accurate and timely financial reporting.

• Internal Controls & Audit Support: Maintain effective controls, procedures, and documentation across billing and receivables operations; provide AR-related schedules and documentation in support of internal and external audits.

• Automation, Process & Systems Improvement: Use AI tools and automation to streamline invoicing, cash application, and reporting; evaluate and improve AR workflows as the business evolves; partner with Business Systems on data flows between NetSuite and operational platforms, including NOS.

• Cross-Functional Partnership: Partner closely with Accounting, FP&A, Treasury, Legal, Sales & Business Development, and Project teams to resolve issues, support customer and contract requirements, and ensure receivables activity aligns with broader business needs.

Required Experience

• Experience: 6+ years of progressive accounts receivable, billing, or related accounting and finance experience, including experience owning or managing core AR or billing activities.

• Education: Bachelor’s degree in Accounting, Finance, Business Administration, or a related field, or equivalent relevant professional experience in lieu of a degree.

• Billing & AR Expertise: Strong hands-on experience across the full receivables lifecycle with emphasis on contract-based invoicing—milestone, time-and-materials, or cost-reimbursable billing—plus cash application, account reconciliation, and discrepa

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