Senior Accountant

Senior Accountant NS2 Mission United States, Virginia, Chantilly 15040 Conference Center Drive (Show on map) Apr 27, 2026 If you're a seasoned accounting professional who thrives in the fast-paced world of government contracting, this is your chance to step into a high-impact role where your expertise directly supports mission-critical operations and strategic growth. NS2 Mission is looking for a Senior Accountant to become a key member of its accounting team. This role calls for an experienced individual with solid Government accounting knowledge to oversee all accounting functions. The ideal candidate will be energetic, collaborative, and eager to contribute to the company's continued success. A strong foundation in project cost accounting, Generally Accepted Accounting Principles (GAAP), and Cost Accounting Standards (CAS) is highly desirable. This position reports directly to the Controller. This is a primarily remote opportunity reporting to Mission's HQ in Chantilly, VA; with the expectation of occasional on-site, as needed.

Primary Responsibilities:

Assist the Controller with the month-end close process, including general ledger account reconciliations, journal entries, indirect cost calculations, revenue reconciliations, and other accounting activities. Familiarity with JAMIS or JAMIS Prime accounting software is required Manage and ensure a smooth financial close process with timely financial analysis and reporting to senior management. Oversee payroll preparation and reconciliation of benefits and deductions. Set up new contracts and maintain contract modifications accurately in the accounting system. Generate and issue invoices to customers, troubleshoot billing issues, and collaborate with program managers for resolution. Review and process subcontractor timecards. Monitor daily cash flow needs and perform monthly bank reconciliations. Support external financial audits and tax compliance requirements. Develop and enforce policies and procedures to ensure sound accounting practices and financial operations. Maintain compliance with company policies and procedures. Contribute to the preparation of annual incurred cost submissions. Provide financial guidance and insights to managers and departments as needed. Identify opportunities to streamline and improve processes, coordinating with relevant teams for cross-functional efficiencies.

Preferred Qualifications:

Bachelor's degree in Accounting or Finance, with at least 5 years of progressive hands-on accounting and personnel management experience. Experience in Government contract accounting preferred. ADP payroll experience is advantageous. CPA certification or active CPA candidacy is desirable. Strong proficiency in Microsoft Word, Excel, and PowerPoint. Familiarity with GAAP and CAS. Understanding of FAR cost principles, government contracting requirements, cost accounting, and job costing. Excellent judgment, leadership, and objectivity to ensure financial accuracy and integrity. Proactive problem-solving approach. Ability to build effective relationships with customers, Government auditors, and internal teams. Self-motivated, with the ability to prioritize, multi-task, and meet deadlines. Comfortable working in a fast-paced, dynamic environment. Strong communication skills and the ability to work under pressure to meet critical deadlines. If you are seeking a role that creates lasting impact for our clients through critical and complex issues, working in a dynamic environment that offers opportunities for professional growth and new responsibilities, consider a career with NS2 Mission. With us, you'll discover a culture of curiosity and collaboration that will energize you to achieve the art of what is possible from the day you start! Please be aware many of our positions require the ability to obtain or maintain a U.S security clearance which requires U.S citizenship. We win with inclusion NS2 Mission's culture of inclusion, focus on health and well-being, and flexible working models help ensure that everyone - regardless of background - feels included and can run at their best. At NS2 Mission, we believe we are made stronger by the unique capabilities and qualities that each person brings to our company, and we invest in our employees to inspire confidence and help everyone realize their full potential. We ultimately believe in unleashing all talent and creating a better world. NS2 Mission is committed to the values of Equal Employment Opportunity and provides accessibility accommodations to applicants with physical and/or mental disabilities. If you are interested in applying for employment with NS2 Mission and are in need of accommodation or special assistance to navigate our website or to complete your application, please send an e-mail with your request to

Recruiting Operations Team:

NS2Mission.

Careers@sapns2.com. Qualified applicants will receive consideration for employment without regard to their age, race, religion, national origin, ethnicity, age, gender (including pregnancy, childbirth, et al), sexual orientation, gender identity or expression, protected veteran status, or disability, in compliance with applicable federal, state, and local legal requirements.