Senior Invoice Resolution Specialist (Senior Procurement Specialist)

Mission Support and Test Services, LLC (MSTS) manages and operates the Nevada National Security Site (NNSS) for the U.S. National Nuclear Security Administration (NNSA).  Our MISSION is to help ensure the security of the United States and its allies by providing high-hazard experimentation and incident response capabilities through operations, engineering, education, field, and integration services and by acting as environmental stewards to the Site’s Cold War legacy.  Our VISION is to be the user site of choice for large-scale, high-hazard, national security experimentation, with premier facilities and capabilities below ground, on the ground, and in the air. (See NNSS.gov for our unique capabilities.) Our 2,750+ professional, craft, and support employees are called upon to innovate, collaborate, and deliver on some of the more difficult nuclear security challenges facing the world today.   

• MSTS offers our full-time employees highly competitive salaries and benefits packages including medical, dental, and vision; both a pension and a 401k; paid time off and 96 hours of paid holidays; relocation (if located more than 75 miles from work location); tuition assistance and reimbursement; and more.  
• MSTS is a limited liability company consisting of Honeywell International Inc. (Honeywell), Jacobs Engineering Group Inc. (Jacobs), and HII Nuclear Inc.

The Senior Invoice Resolution Specialist (Senior Procurement Specialist) plays a critical role within the Contracts & Procurement organization, responsible for supporting the financial integrity and operational efficiency of procurement invoice process. This individual will manage complex invoice processing, ensure compliance with contractual terms, and facilitate timely and accurate payments to vendors and subcontractors. The Specialist in this role requires a strong understanding of procurement principles, robust analytical skills, and the ability to collaborate across internal departments and with external suppliers. 

Key Responsibilities

• Invoice Management & Reconciliation: Manage the full lifecycle of invoices related to subcontracts, purchase orders, and construction agreements, ensuring accuracy and adherence to established procedures. Reconcile invoices with purchase orders, goods received, and service agreements, resolving discrepancies promptly.
• Cross-Functional Coordination: Act as a central point of contact for invoice-related matters, coordinating extensively with Procurement Buyers, Accounts Payable, Project Controls, Procurement Systems Team, Subcontract Technical Representatives (STRs), Warehouse, and Material Protection & Control (MPC) to ensure seamless processing, accurate cost allocation, and timely resolution of issues.
• Compliance & Documentation: Ensure all invoice processing and payment activities comply with prime contract terminology, legal and commercial terms, company policies, and relevant regulatory requirements (e.g., Davis-Bacon Act for certified payroll records). Maintain organized files and controls for all incoming and outgoing correspondence related to invoicing.
• Problem Resolution: Act as a primary point of contact for complex invoice issues, payment disputes, and discrepancies with suppliers and subcontractors. Collaborate with internal stakeholders to facilitate resolutions.
• Supplier Communication: Communicate effectively with suppliers and subcontractors regarding invoice status, payment queries, and to achieve required service and results. Monitor supplier performance as it relates to commercial terms for services rendered.
• Root Cause Analysis: Perform root cause analysis for recurring invoice issues and collaborate with relevant departments to implement corrective actions and preventive measures.
• Process Improvement: Identify and recommend enhancements to invoice processing workflows and contribute to the development of procurement operational procedures to improve efficiency and accuracy.
• Reporting & Analysis: Assist in generating reports related to invoice processing, payment cycles, and financial commitments, providing insights to the Procurement Manager.
• System Utilization: Proficiently utilize financial software and ERP systems for invoice processing, data entry, and record-keeping, ensuring data integrity.
• Support to Procurement Activities: Provide support to procurement activities by assisting with administrative problem-solving related to high monetary expenditure or risk, and by ensuring proper invoicing practices are followed for project commitments.

Due to the nature of our work, US Citizenship is required for all positions.

• Bachelor’s degree in related field or equivalent training and experience with at least 5 years relevant, progressively responsible experience.
  • Preferred: Bachelor’s degree