Subject Matter Expert, Linux Systems Administration

Terms of Employment

• Full-Time, Permanent
• This position is onsite four days per week in Ft. Washington, MD. Once every two-to-three weeks, there is one day of work onsite in Warrenton, VA. The ability to work remotely once per week is acceptable.
• Required Clearance: Active Top Secret with eligibility for SCI

Overview & Responsibilities
As a Senior Linux Systems Engineer, you will serve as the technical authority for a Red Hat Enterprise Linux (RHEL) environment supporting the Cameo (Dassault Systèmes/No Magic) suite. This role requires more than standard administration; we are looking for a specialist with CLI-level mastery capable of deep-tier kernel tuning and performance optimization. You will ensure the integrity of server resources, manage a complex Virtual Desktop Infrastructure (VDI), and provide high-level technical support to a large community of system engineers and partners. You will be responsible for…
Advanced Systems Engineering & Kernel Optimization

• Perform kernel-level tuning (sysctl), I/O scheduling, and memory management to optimize RHEL for high-demand MBSE workloads.
• Execute all administrative tasks, file management, and system troubleshooting via the command-line interface (CLI) in a headless or cloud environment.
• Proactively monitor system health and performance to ensure 99.9% availability of mission-critical server resources and hardware.
  Cameo & VDI Administration
• Act as the primary administrator for Cameo Systems Modeler and Teamwork Cloud, managing user groups, permissions, and server-side configurations.
• Configure and troubleshoot user profiles in a virtual desktop environment using XRDP.
• Create, maintain, and deploy virtual desktop images, ensuring optimized disk storage and session management for multiple concurrent users.
  Security, Automation & Compliance
• Work closely with ISSO/ISSE teams to ensure systems meet ATO/accreditation standards through aggressive scanning, patching, and STIG compliance.
• Utilize Ansible, Puppet, or scripting (Bash/Python) to automate routine maintenance and configuration management.
• Author and maintain technical standards, Standard Operating Procedures (SOPs), and RunBooks to ensure continuity of operations.
  Agile Integration & Collaboration
• Maintain a detailed work backlog in JIRA, participating in Agile ceremonies and communicating technical status to PMs and Government leads.
• Explain complex technical considerations to external partners and provide high-tier technical support to the user community.

Required Skills & Experience

• Active Top Secret clearance with SCI eligibility.
• IAT Level II compliant (e.g., Security+, CySA+, GSEC, SSCP, CCNA Security, CND, GICSP).
• Expert-level knowledge of Red Hat Enterprise Linux (RHEL).
• Expert-level proficiency in the Linux Command Line Interface (CLI). Must be able to manage the full OS lifecycle without a Graphical User Interface (GUI).
• Demonstrated experience in Linux kernel tuning and performance optimization for enterprise-scale applications.
• Proven experience with XRDP, VDI session management, and image deployment.
• Proficiency in Cameo / No Magic software.
• Experience using JIRA.
• Proficiency in Bash or Python scripting and Ansible configuration management.
• Solid understanding of TCP/IP, SSH, and secure networking protocols.

Preferred Skills & Experience

• Active Top Secret/SCI clearance.
• Red Hat Certified System Administrator (RHCSA) or Engineer (RHCE).
• Experience with cloud-based Linux deployments.
• Background in Model-Based Systems Engineering (MBSE) workflows.