TerraPower LLC.
Payroll Specialist
Bellevue, WA
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hirly's read of this role
- Seniority
- Mid level
- Stated salary
- $87,686 – $154,206 per year
- Country
- US
- Work mode
- Remote-friendly
- First seen by hirly
- 3 Oct 2026
Derived automatically from the posting. Upload your resume above to see how the role scores against it.
the posting
TerraPower is a nuclear technology company based in Bellevue, Washington. At its core, the company is working to raise living standards globally through a more affordable, secure, and environmentally friendly form of nuclear energy along with innovations in medical isotopes to improve human health. In 2006, TerraPower originated with Bill Gates and a group of like-minded visionaries who evaluated the fundamental challenges to raising living standards around the world. They recognized energy access was crucial to the health and economic well-being of communities and decided that the private sector needed to take action and create energy sources that would advance global energy deployment. TerraPower’s mission is to be a world leader in new nuclear technologies, while developing innovators and future leaders in the nuclear field. As a result, the company’s activities in the fields of nuclear energy and related sciences are yielding significant innovations in the safety and economics of nuclear power, hybrid energy and medical applications – all for significant human health benefits.”
TerraPower is seeking to hire highly motivated and forward-thinking professionals who are interested in focusing on advanced nuclear reactor research and development and influencing change within the nuclear power landscape and bringing forward the critical production of medical isotopes. TerraPower is an Equal Opportunity Employer. We do not discriminate in hiring on the basis of sex, gender identity, sexual orientation, race, color, religious creed, national origin, physical or mental disability, protected Veteran status, or any other characteristic protected by federal, state, or local law.
Payroll Specialist
Responsibilities
Support payroll administrations across multiple business segments compliance for remote workforce across multiple states outside of Washington State
Process global payroll and benefits
Timely and accurately process multi-state payroll withholding, remittance of payroll taxes including federal, state, local taxes, any amendments as needed.
Understand proper taxation for employer paid benefits for multi-state payrolls
Track multi-state payroll/benefits compliance year-round (i.e. PTO, overtime), provide employee communications, help with completing year-end compliance requirements.
Review and incorporate any multi-state payroll/benefits required disclosures in the annual open enrollment materials, benefits summary, certification and contracts or accuracy, and distribute required documents for compliance
Prepare bi-weekly multi-state payroll and benefits reconciliation, quarterly W-2 review, conduct internal benefits audit to ensure data integrity
Calculate tax gross up related to relocation Calculate workers compensation and quarterly Washington State L&I owed
Assists with internal and external audits. i.e. workers compensation, insurance audit, L&I, DOL, 401K, GAAP financial and other compliance audits
Support benefits and leave administration experience including health, disability, life, and 401(k) as well as ancillary benefits
Assist annual open enrollment, new hire enrollments, qualifying life events/benefit changes
Partnering with benefits broker to support insurance claims and general troubleshooting
Support leave eligibility and calculations, partnering with our vendors, insurance carriers and benefit broker to resolve issues such as billing and claims
Perform payroll/benefits reconciliation per internal procedure and identify and resolve payroll issues timely
Assist On-boarding new employees including leading new hire orientation, explanation of benefits, policies and systems, prepare new hire packets and post on-boarding orientation follow up
Assist Off board terminating employees in ADP, complete HR termination template request, submit the insurance carrier template and notify the COBRA vendor if needed
Adhere to compliance calendar deadlines
Submit Internal Communications and updating benefit notifications/materials to TP Web
Support HRIS integration with ADP. Routine cross check of HR information in HRIS with ADP employee of records.
Assist with employee questions/changes for direct deposit, tax withholding allowances, qualifying life events, benefit changes, etc.
Identify opportunities for process and systems improvements. Assist any ad hoc projects as needed
Key Qualifications and Skills
At a minimum, four year BA/BS degree in Accounting, Finance, or General Business
A minimum of seven years of payroll administration experience including health, disability, life, and 401(k) as well as ancillary benefits
Experience in global payroll and benefits
Experienced with processing multi-state payroll
Customer service oriented in high growth, high touch organization
Accuracy, time management, and timely follow-up
Proficient with Microsoft Office suite tools and able to quickly adapt to other Finance and Accounting systems (Oracle Fusion, ADP)
Working knowledge of payroll systems, experience with ADP preferred
Highly organized and detail-oriented; high degree of accuracy
Experience completing payroll journal entries, month end payroll reconciliation and an understanding of accounting principles
Ability to multi-task. Handle payroll processing, benefits projects and ad hoc requests timely and accurately
Capable of quickly comprehending new information and technologies
Capable of working in a fast-paced environment
Strong communication skills, comfortable working with operations team/non-accounting professionals
Ability to keep payroll and Human Resource information confidential
The successful candidate will possess a high degree of trust and integrity, communicate openly and display respect with a desire to foster teamwork.
TerraPower’s technology is controlled for export by various agencies of the U.S. Government. TerraPower must evaluate applicants who are foreign nationals (other than asylees, refugees, or lawful permanent residents) in accordance with U.S. Government export control requirements. To facilitate TerraPower’s export control reviews, you will be asked as part of the application process to identify whether you are a U.S. Citizen or national, asylee, refugee, or lawful permanent resident of the United States. Government export authorization approval times vary. Based on the business needs for a particular position, TerraPower may not consider a foreign national from a country if it is impracticable to obtain timely Government export approval.
Job Functions:
Job Functions are physical actions and/or working conditions associated with the position. These functions may also constitute essential functions for the job which the employee must be able to fulfill, with or without accommodation. Information provided below is to help describe the job so that the applicant has a reasonable understanding of the job duties/expectations. An applicant's ability to perform and/or tolerate these actions and conditions will be discussed and workplace accommodations may be made on a case-by-case basis following an individualized assessment of the applicant and other considerations, including but not limited to any governing safety standards.
Motor Abilities: Sitting for extended periods, bending/stooping, grasping/gripping, fine motor control (hands)
Physical exertion and/or requirements: Minimal, with ability to safely lift up to 25 pounds.
Repetitive work: Prolonged
Special Senses: Visual and audio focused work
Work Conditions: Stairs, typing/keyboard, standard and/or sitting working environment of >8 hours/day
Travel required 0-10%
TerraPower’s technology is controlled for export by various agencies of the U.S. Government. TerraPower must evaluate applicants who are foreign nationals (other than asylees, refugees, or lawful permanent residents) in accordance with U.S. Government export control requirem
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