Payroll, AP, and T&E Manager

RSI EnTech • Oak Ridge, Tennessee • Full Time

Posted on Thu, Jul 9, 2026

Company Overview

RSI provides full-service environmental solutions supporting clients through all phases of cleanup, with expertise in regulatory compliance, characterization, monitoring, renewable energy, and project management. Built on a strong foundation of collaboration and a people-first culture, RSI is known for being easy to work with and delivering results through long-term partnerships.

RSI is part of a family of companies unified by purpose to deliver safe, reliable solutions to our clients’ unique challenges. We are committed to providing technically superior service, adding value at every stage, and leaving things better than we found them.​

Job Summary:

The Payroll, Accounts Payable (AP), and Travel & Expense (T&E) Manager is responsible for the end-to-end management of payroll, vendor payables, and employee expense processes within a government contracting environment. This role ensures strict compliance with FAR, DCAA, and other regulatory requirements, while maintaining accurate financial records in Deltek Costpoint ERP.

The position plays a critical role in supporting project accounting, audit readiness, and internal controls, while driving operational efficiency and leading a multi-functional team. This position is an office-based environment, with extended hours during payroll cycles, month-end close, and audit periods.

Payroll Management (Government Contracting Focus)

Accounts Payable

Travel & Expense (T&E)

Compliance, Controls & Audit

Leadership & Process Improvement

Requirements and Education:

Preferred Requirements and Education:

Key Competencies:

Success Metrics:

Clearance and Health Regiments

EEO Statement

RSI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, gender, color, age, sexual orientation, gender identification, national origin, religion, marital status, ancestry, citizenship, disability, protected veteran status, or any other factor prohibited by applicable law.

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