Skip to content

General information

Requisition #
R58969
Locations
USA-VA-Herndon
Posting Date
03/10/2025
Security Clearance Required
None
Remote Type
Hybrid
Time Type
Full time

Description & Requirements

Elevate your career with ManTech International Corporation! Join a dynamic team dedicated to national security through cutting-edge technology. Since 1968, ManTech has led in delivering advanced solutions to government intelligence, the Department of Defense, and Federal Civilian sectors. Dive into innovation in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Your journey to impactful work and rapid growth starts now—be extraordinary at ManTech!

ManTech seeks a motivated, career, and customer-oriented Senior Accounts Payable Accountant to join our team in Herndon, VA. This is a hybrid position which will require up to 2 days onsite in Herndon, VA.

The Senior Accounts Payable Accountant maintains responsibility for the daily oversight of all Accounts Payable functions, ensuring meticulous adherence to established company policies and procedures. This role will play a key function in facilitating acquisition related support and will proactively identify and implement process improvements to optimize efficiency and ensure the accurate and timely completion of all departmental deadlines.

Responsibilities include but are not limited to:

  • Identify and implement process improvements within Accounts Payable, increasing efficiency and accuracy. Serve as a point of contact for employees, vendors, and internal departments, addressing inquiries regarding invoices and payments with professionalism and efficiency.

  • Integrate Accounts Payable systems and processes from acquired companies, ensuring a seamless transition and minimal disruption to operations.

  • Manage vendor ACH requests, stop payments, and weekly cash disbursements and ensure accurate invoice processing by reconciling purchase orders and resolving discrepancies.

  • Reconcile vendor statements, research payment issues, and process necessary corrections.

  • Maintain and update Accounts Payable master files and system configurations to optimize performance and data integrity. Collaborate with business users to identify and resolve system and process issues and support month-end, quarter-end, and year-end closing processes, including 1099 preparation and account reconciliation.

  • Assist with external and internal quarterly and annual audits and ensure compliance with generally accepted accounting standards.

  • Provide guidance, mentorship and training to Accounts Payable staff as well as contribute to process improvements and assist with other accounting tasks as needed.

Minimum Qualifications:

  • Bachelor’s degree in accounting or business and 5 or more years of relevant Senior Level Accounts Payable experience

  • Proficient with PeopleSoft 9.2 and Costpoint 8 AP module, or similar ERP system

  • Full cycle working understanding of Accounts Payable function within an ERP system

  • Experience with Outlook or Gmail, and a Service Desk environment

  • Excellent verbal and written communication skills and a commitment to professionalism

  • Thorough working knowledge of Microsoft Office applications, including advanced knowledge of Excel, Adobe Acrobat Pro, Word, PowerPoint, and Teams.

Clearance Required:

  • No clearance is required. US Citizenship is required.

Physical Requirements:

  • Must be able to be in a stationary position more than 50% of the time

  • The person in this position frequently communicates with co-workers, management and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations

  • Constantly operates a computer and other office productivity machinery, such as a computer

  • The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.


ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at careers@mantech.com and provide your name and contact information.