Senior Tax Analyst - Tax Technology & Reporting

Amentum is a global leader in advanced engineering and innovative technology solutions, trusted by the United States and its allies to address their most significant and complex challenges in science, security and sustainability. Our people apply undaunted curiosity, relentless ambition and boundless imagination to challenge convention and drive progress. Our commitments are underpinned by the belief that safety, collaboration and well-being are integral to success.Headquartered in Chantilly, Virginia, we have approximately 50,000 employees in more than 70 countries across all 7 continents.

The Senior Tax Analyst – Tax Technology & Reporting will report to Senior Manager Tax Reporting and will be responsible for supporting the tax department’s technology, automation, data, reporting, and process-improvement initiatives across Amentum’s global tax function. This individual contributor role will help improve the efficiency, accuracy, controls, and scalability of Amentum’s tax processes, including U.S. and international tax compliance, ASC 740 tax provision support, transfer pricing data, indirect tax, Pillar Two / global tax reporting, and foreign statutory reporting processes. US Citizenship is required. Candidates must live within driving distance to our offices in Northern Virginia. This is a local-remote-telework role.

This is a strong opportunity for someone who enjoys working at the intersection of tax, accounting, data, systems, and process transformation in a dynamic, multinational environment.

Main responsibilities :

• Support the design, implementation, maintenance, and enhancement of tax technology solutions used by the global tax department.
• Partner with tax, accounting, financial reporting, IT, controllership, shared services, and external advisors to improve tax data collection, validation, reporting, and analytics.
• Develop and maintain automated workflows, reports, dashboards, reconciliations, and data models to support tax compliance, tax provision, planning, transfer pricing, audit defense, and management reporting.
• Support tax provision and compliance processes by improving data extraction, transformation, and reconciliation from ERP, consolidation, and financial reporting systems.
• Assist with administration and optimization of tax software and related tools, which may include tax provision, income tax compliance, transfer pricing, indirect tax, document management, workflow, and data analytics platforms.
• Assist with gathering, organizing, and validating data for foreign financial statements, local country reporting, tax audits, transfer pricing documentation, public country-by-country reporting, and other statutory or regulatory reporting requirements.
• Support process improvements for recurring tax deliverables, including quarterly and annual provision, income tax compliance, indirect tax filings, R&D credit data, transfer pricing calculations, and international tax reporting.
• Work with leadership to identify manual, high-risk, or inefficient processes and convert them into sustainable, repeatable, well-controlled workflows.
• Assist with implementation of controls, documentation, and governance over tax data, tax technology processes, and key tax reporting workstreams.
• Help maintain tax department dashboards, trackers, calendars, workflow tools, and documentation repositories.
• Monitor developments in tax technology, automation, data analytics, AI-enabled tools, and global tax reporting requirements that may affect Amentum’s tax function.
• Perform other duties as assigned.

Knowledge, Skills, and Abilities :

• Strong tax, accounting, systems, and data orientation, with the ability to understand how tax reporting requirements connect to ERP, consolidation, statutory reporting, and compliance data.
• Advanced Microsoft Excel skills required; experience with Power Query, Power Pivot, Power BI, Alteryx, Tableau, SQL, Python, or other data analytics / automation tools preferred.
• Experience with tax provision, income tax compliance, international tax, indirect tax, transfer pricing, or statutory reporting processes.
• Familiarity with tax provision or compliance software such as ONESOURCE Tax Provision, ONESOURCE Income Tax, or similar platforms preferred..
• Ability to extract, reconcile, analyze, and explain complex data from multiple systems and sources.
• Strong project-management skills, including the ability to manage recurring deadlines, competing priorities, and cross-functional workstreams.
• Strong attention to detail and commitment to data accuracy, documentation, controls, and process discipline.
• Ability to translate tax department needs into practical technology, reporting, and process solutions.
• Strong written and verbal communication skills, including the ability to work effectively with tax professionals, finance teams, IT personnel, external advisors, and business stakeholders.
• Positive attitude, intellectual curiosity, and willingness to learn new systems, processes, and tax reporting requirements.

Minimum Requirements :

• Typically 4 years of relevant experience in corporate tax, public accounting, tax technology, finance transformation, tax reporting, statutory reporting, accounting systems, or data analytics with a Bachelor’s degree in Accounting, Finance, Information Systems, Data Analytics, Business, Tax, or a related field.
• Experience with a multinational public company, large private company, government contractor, or public accounting / consulting firm preferred.
• CPA, EA, MST, MBA, PMP, Alteryx, Power BI, Microsoft Power Platform, data analytics, or similar certification preferred.
• U.S. Citizenship required.
• Candidates must be within driving distance to Amentum offices in Northern Virginia.

Compensation Details:

The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.

Benefits Overview:

Our health and welfare benefits are designed to support you and your priorities. Offerings include:

• Health, dental, and vision insurance

• Paid time off and holidays

• Retirement benefits (including 401(k) matching)

• Educational reimbursement

• Parental leave

• Employee stock purchase plan

• Tax-saving options

• Disability and life insurance

• Pet insurance

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

Original Posting:

Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.