Cost Accountant

Xcimer Energy

200

Denver, CO

Posted on: 2026-05-26

Category: energy

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Employment type:

Full time

Experience required:

Intermediate

Salary

Salary not provided

About the company:

Xcimer Energy is a fusion energy company focused on commercializing laser-driven inertial confinement fusion, which it describes as the only scientifically validated form of fusion energy. The company is developing high-energy excimer laser systems designed to ignite fusion reactions using fuel derived from seawater and lithium, with the goal of delivering safe, clean, and affordable electricity that is cost-competitive with fossil fuels and renewables. Its mission centers on decarbonizing energy-intensive sectors such as artificial intelligence infrastructure, desalination, and industrial processes that require firm, always-on, carbon-free power. Xcimer's technical approach relies on electron-beam-pumped excimer lasers combined with a pulse compression technique called Stimulated Brillouin Scattering (SBS), which compresses microsecond laser pulses to nanosecond durations without damaging optics. In 2024 the company broke ground on Phoenix, its first prototype high-energy laser system, located in Denver, Colorado, and announced the start of its operations in June 2026. Phoenix is the first electron-beam-pumped excimer laser built in the private sector in more than two decades and validates key elements of the company's low-cost laser fusion architecture. Xcimer's longer-term target is Athena, which it describes as the world's first laser fusion power plant, expected to deliver 400 megawatts of continuous clean energy by 2035. The company has received a U.S. Department of Energy approval of its fusion power plant preconceptual design and technology roadmap milestone, and collaborates with industrial partners such as TRUMPF Laser SE. With a team of nearly 200 engineers, physicists, and business professionals, Xcimer positions itself as the most technically mature private laser fusion company.

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

This is a full-time, onsite role based at our headquarters in Denver, CO.

As a Cost Accountant, you will apply your skills to oversee all aspects of accounting operations including general ledger, accounts payable, audit, and compliance functions while establishing robust financial controls, policies, and reporting systems that protect company assets and ensure regulatory compliance. The role demands excellence in supporting team members, developing cost accounting, and supporting a move in accounting infrastructure to new enterprise systems including ERP and government compliance tools. We are looking for an experienced accountant to apply their expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

Responsibilities

Financial Accounting & Close

Own the monthly, quarterly, and annual close processes, ensuring timely and accurate financial statements in accordance with US GAAP
Prepare and review journal entries, account reconciliations, and financial analyses
Maintain and enhance internal controls, accounting policies, and procedures

Tax Credits and Incentives

Support team in exploring incentives available for tax credits by identifying programs that would fit our anticipated project spend
Complying with and documentation requirements for obtaining these tax credits and incentives.

Cost Accounting & Manufacturing Finance

Lead cost accounting for a capital-intensive manufacturing environment, including inventory, WIP, overhead allocation, and standard costing
Monitor capital expenditures, fixed assets, depreciation, and capitalization of equipment and tooling

R&D Accounting

Oversee accounting treatment for R&D activities, including capitalization vs. expense considerations
Track and report R&D costs by program, contract, or grant as required
Support R&D tax credit documentation and coordination with external advisors

Qualifications

Education: Bachelor’s degree in accounting or finance.

Experience: 5+ years of progressive accounting experience, including manufacturing or project-based environments.

Strong knowledge of US GAAP, project and cost accounting, and internal controls.

Experience in implementing an integrated systems.

Hands-on experience with inventory, WIP, fixed assets, and capital-intensive operations.

Excellent communicator; can articulate complex concepts to a varied audience.

Flexible and adaptable, with the ability to evaluate the need for change and the impact to the business; a builder.

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.