Senior Accounts Payable Accountant

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 wit