Assistant Controller

We are seeking an Assistant Controller for our Broomfield, CO, or Brooklyn Park, MN, location. Quantinuum believes that employees work better, more efficiently, and more collaboratively in close proximity to other employees, where ideas can be exchanged readily, and decisions can be made more quickly for the benefit of the Company and our customers. All employees should work at their assigned location; however, this role may offer the opportunity to work remotely up to 2 days per week, with approvals. As our Assistant Controller , you will be a critical partner to the Sr. Controller and CFO, helping lead the financial reporting, accounting operations, and internal control environment for our U.S. business. Key Responsibilities: Oversee month-end close, including journal entries, reconciliations, and analysis of key balance sheet accounts. Generating financial reporting in accordance with U.S. GAAP, supporting both internal and external reporting needs. Assist with the preparation and review of consolidated financial statements and schedules. Support internal control activities, SOX testing, and remediation efforts. Support budgeting, forecasting, and planning processes, working closely with FP&A and business partners. Analyze financial results, identify trends, and provide insights on variances, risks, and opportunities. Help develop, maintain, and improve accounting policies, procedures, and documentation. Mentor and develop junior accounting staff; provide leadership and hands-on coaching. Work with external auditors during audit planning and execution, ensuring timely deliverables. Partner cross-functionally (e.g., Tax, Treasury, Legal) to support financial initiatives, system implementations, and process improvements. YOU MUST HAVE: Bachelor’s Degree minimum Minimum 8+ years of experience in Project Accounting, Cost Accounting, Fixed Assets, and GL/AP/AR Due to Contractual requirements, must be a U.S. Person defined as a U.S. citizen, permanent resident, or green card holder, worker granted asylum, or refugee status Due to national security requirements imposed by the U.S. Government, candidates for this position must not be a People's Republic of China national or Russian national unless the candidate is also a U.S. citizen. WE VALUE: Master’s degree in accounting, Finance, or related fields preferred Strong GAAP knowledge, experience with consolidated financial statements, and accounting close processes. Previous SOX/internal control experience is highly desirable. Comfortable driving accounting work in ERP systems (SAP S4/HANA, SAP ECC, Oracle Net Suite) and financial reporting tools. Exceptional analytical, problem-solving, and financial modeling skills; ability to simplify complex financial data for business partners. Excellent written and verbal communication skills; ability to convey financial insights clearly to non-finance stakeholders. Experience supervising or mentoring other accounting professionals. Thrives in a fast-paced, high-growth environment with evolving priorities. Gov CAS Ledger accounting, Accounting Information System (AIS), Audit (big 4 client or provider side or both) preferred. You’re motivated by innovation and enjoy diving deep into complex financial topics. You work cross-functionally and build relationships easily, aligning finance goals with broader strategic objectives. You hold yourself to high standards around accuracy, transparency, and compliance. You pair retrospective reporting with forward-looking insights to uncover emerging risks and opportunities Quantinuum is the world leader in quantum computing. The company’s quantum systems deliver the highest performance across all industry benchmarks. Quantinuum’s over 650 employees, including 400+ scientists and engineers, across the US, UK, Germany, and Japan, are driving the quantum computing revolution. By uniting best-in-class software with high-fidelity hardware, our integrated full-stack approach is accelerating the path to practical quantum computing and scaling its impact across multiple industries. By joining Quantinuum, you’ll be at the forefront of this transformative revolution, shaping the future of quantum computing, pushing the limits of technology, and making the impossible possible. What’s in it for you? A competitive salary and innovative, game-changing work Flexible work schedule Employer subsidized health, dental, and vision insurance 401(k) match for student loan repayment benefit Equity, 401k retirement savings plan + 12 Paid holidays and generous vacation + sick time Paid parental leave Employee discounts Quantinuum is an equal opportunity employer. You will be considered without regard to age, race, creed, color, national origin, ancestry, marital status, affectional or sexual orientation, gender identity or expression, disability, nationality, sex, or veteran status. Know Your Rights: Workplace discrimination is illegal Applications will be accepted on an ongoing basis, there is no application deadline for this position.