New

Billing Specialist

Modern Technology Solutions, Inc.
401(k)
United States, Virginia, Alexandria
5285 Shawnee Road (Show on map)
Oct 29, 2026
Modern Technology Solutions, Inc. (MTSI) is hiring a Senior Billing Specialist in Alexandria, VA. Qualified candidates must be U.S. citizens. Responsibilities: Manages program and project implementation and makes significant contributions to department goals and planning efforts. Knows when to escalate problems/questions to a higher level and work with internal and external customers. Provide "Cradle to Grave" billing and invoicing processes. Prepare complex invoices for various types of government contracts within MTSI's corporate Accounting department using various tools such as; (Cost Plus, Cost Plus Fixed fee, Firm Fixed Price, T&M, etc.). Communicate with Program Managers and Project Controllers to create monthly invoices for multiple contract types. Take accountability for the quality and timely delivery of all agreed-upon deliverables. Maintain direct correspondence with PMs and other POCs regarding assigned project costs for billing purposes. Reconcile billings and unbilled amounts monthly. Assist with collection activity and resolution of outstanding invoices from past due accounts. Interface with internal and external customers and work closely with the Contracts and Accounting personnel. Support various aspects of the monthly financial reporting to include analysis open billing details. Additional duties, responsibilities, and activities may be assigned at any time. Required Qualifications: Bachelor's degree in related field 7+ years of experience with government contract invoicing and applying FAR/AS regulations Requires in-depth knowledge, expertise, and experience; proficiency in Excel and Word and extensive knowledge of CostPoint billing 8.1 and cost modules; Understand FAR, CAS and GAAP. Interprets internal or external business issues and recommends solutions / best practices; continually seeks updated knowledge on issues impacting current programs/projects/processes. Experience submitting invoices on customer systems such as WAWF. Routinely interface with other senior-level leaders and teammates; always demonstrating outstanding poise and strong cross-functional teamwork. Is accommodating to both positive and negative customer feedback. As available/needed: represent MTSI at conferences, workshops, or symposiums by chairing a session, participating in a panel discussion, or presenting a paper. Travel Requirements: This position offers the opportunity to work remotely, however, some travel may be required to attend quarterly meetings with teams. Physical Requirements:* Frequent sitting for long periods using computer keyboard, zoom conferencing, Microsoft teams, telephone etc. Keyboarding: Entering text or data into a computer or other machine by means of a traditional keyboard (traditional keyboard refers to a panel of keys used as the primary input device on a computer, typographic machine or 10-key numeric keypad). Please note: Candidate must be able to successfully pass a credit check and criminal background investigation. The pay range for this position is $80,000 to $120,000/year; however, base pay offered may vary depending on established government contract ranges, job-related knowledge, skills, and experience, and other factors. MTSI also offers a full range of medical, financial, and other benefits, dependent on the position offered. Base pay information is based on market location. Applications will be accepted on an ongoing basis. This posting will be renewed periodically until the position is filled. #LI-RC2 Interesting Work: Our co-workers support some of the most important and critical programs to our national defense and security. Values: Our first core value is that employees come first. We challenge our co-workers to provide the highest level of support and service, and reward them with some of the best benefits in the industry. 100% Employee Owned: We have a stake in each other's success, and the success of our customers. It's also nice to know what's going on across the company; we have company wide town-hall meetings three times a year. Great Benefits - Most Full-Time Staff Are Eligible for: Starting PTO accrual of 20 days PTO/year + 10 holidays/year Flexible schedules 6% 401k match with immediate vesting up to $9k annually Semi-annual bonus eligibility (July and December) Company funded Employee Stock Ownership Plan (ESOP) - a separate qualified retirement account Up to $10,000 in annual educational reimbursement Other company funded benefits, like life and disability insurance Optional zero deductible Blue Cross/Blue Shield health insurance plan Track Record of Success: We have grown every year since our founding in 1993. Modern Technology Solutions, Inc. (MTSI) is a 100% employee-owned engineering services and solutions company that provides high-demand technical expertise in Digital Transformation, Modeling and Simulation, Rapid Capability Development, Test and Evaluation, Artificial Intelligence, Autonomy, Cybersecurity and Mission Assurance MTSI delivers capabilities to solve problems of global importance. Founded in 1993, MTSI today has employees at over 20 offices and field sites worldwide. For more information about MTSI, please visit www.mtsi-va.com MTSI embraces nine core values including our first core value of Employees come first. Consistent with our Core Values, we are committed to Equal Opportunity, making decisions without regard to race, color, religion, sex, national origin, age, military/veteran status, disability, or any other characteristics protected by applicable law. MTSI is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants and employees with physical and/or mental disabilities.