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# Senior Systems Engineer

- **Company:** Aptima Inc.
- **Location:** Dayton, OH, United States
- **Experience:** Expert
- **Salary:** $140,000.0 - $154,000.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Systems Engineering, Configuration Management, Linux, Distributed Systems, Linux System Administration, Distributed Simulation, Simulation Software, Systems Integration, Modeling and Simulation
- **Published:** October 18, 2026
- **Apply:** https://jobs.localjobnetwork.com/apply/add/88457755/1

## About the Role

* 100% on-site at the Dayton, OH customer location.
 * 5+ years of experience in modeling & simulation, systems engineering, networking, or related technical domains.
 * Experience integrating M&S systems using protocols such as GRID, DIS, or HLA/RPR-FOM.
 * Strong proficiency with Windows and Linux system administration and troubleshooting.
 * Hands-on experience with simulation frameworks (e.g., AFSIM, NGTS) or comparable modeling tools.
 * Demonstrated ability to analyze distributed system behavior, network performance, and system interactions.
 * Excellent documentation, configuration management, and communication skills.
 * Proven ability to work independently, lead technical efforts, and collaborate within cross-functional teams.
 * Eligibility for a U.S. Security Clearance is required.
 * Desired Certifications: Must meet DoD 8140 IAT Level II compliance (e.g., Security+).

## Description

As a Senior Systems Engineer supporting simulation-based training systems, you will help advance Aptima's mission by designing, developing, integrating, and sustaining technical solutions within a government-owned modeling and simulation (M&S) environment. You will lead efforts to architect, configure, and validate systems that enable realistic, high-fidelity simulation for training and mission rehearsal.

In this senior role, you will guide prototyping, integration, and troubleshooting activities across a diverse set of modeling and simulation tools, frameworks, and simulators. Whether integrating complex training devices into a distributed simulation environment, evaluating system and network performance, or ensuring readiness for large-scale events, your technical leadership will directly enhance operator training effectiveness and mission preparedness.

This role is ideal for experienced engineers who excel in hands-on technical work, cross-functional collaboration, and shaping innovative simulation capabilities., * Lead installation, configuration, and maintenance of simulation system stacks aligned with current technical baselines.

 * Architect and execute integration of simulators and M&S tools using common networking standards and protocols such as GRID, DIS, or related interfaces.
 * Integrate and validate simulation frameworks and tools (e.g., AFSIM, NGTS, or similar systems) within the broader M&S environment.
 * Ensure simulator and system readiness through configuration management, documentation, and continuous improvement of integration and sustainment processes.
 * Collaborate with mission partners to plan demonstrations, dry runs, and evaluations; support event planning, execution, and debrief.
 * Coordinate with mission partners to plan and execute demonstrations, dry runs, training events, and technical evaluations.
 * Perform advanced troubleshooting across Windows and Linux systems, networks, and simulation tools.
 * Provide technical leadership during hardware installations, system upgrades, facility modifications, and capability enhancements.
 * Mentor junior engineers and contribute to technical standards, best practices, and integration patterns across the M&S ecosystem.