New

Sr. Information System Security Engineer

Innovative Defense Technologies
$135,000 - $231,000or $164,000 - $273,000
paid holidays, tuition assistance, 401(k)
United States, Virginia, Arlington
4401 Wilson Boulevard (Show on map)
Feb 06, 2026
Description About The Role: Innovative Defense Technologies (IDT), provider of cutting-edge cloud-based integration, automated testing and data analysis for complex, mission-critical systems in the US Department of Defense (DOD), is seeking a Sr. Information System Security Engineer to be part of our Security team and based out of our Arlington, VA location. Experience in managing, maintaining, and securing Arlington critical virtual infrastructure, physical and Linux/Windows environment. The ideal candidate has a deep technical background in virtualization/physical best practices, excellent troubleshooting skills, and a proven ability to maintain highly available, secure, and performant systems. Clearance & Location Requirements: All applicants must currently possess an active Secret U.S. Security Clearance. This is an on-site position. Requiring at least 5 days in office, based out of our Arlington, VA location. What You Will Do: VMware Infrastructure Management: Design, install, configure, and maintain VMware vSphere environments, including ESXi hosts and vCenter Server. Security & Compliance: Ensure the highest levels of systems and infrastructure availability, security, and performance; implement and maintain security, backup, and redundancy strategies. Demonstrate the ability to manage, execute, and maintain system compliance through STIG implementation, SCAP scanning, and ACAS/Nessus vulnerability management. Documentation: Create and maintain comprehensive documentation for system configurations, processes, and infrastructure maps. Collaboration: Work closely with other IT staff and business units to understand needs and implement solutions that meet organizational objectives. Window System Administration: Install, configure, secure, and maintain windows operating systems (Windows 11) in both virtual and physical environments. Server Administration: Install, configure, secure, and maintain server operating system (Server 2022 and 2025) in both virtual and physical environments. Linux System Administration: Install, configure, secure, and maintain Linux operating systems (Red Hat) in both virtual and physical environments. Automation & Scripting: Develop and maintain automation scripts (e.g., Bash, Python, PowerCLI, Ansible Playbook) to streamline routine administrative tasks, deployments, and reporting. Troubleshooting: Provide Tier 3/4 support to quickly diagnose and resolve complex system and virtual/physical system performance issues, system configuration problems, and outages. Who You Are (Required): Bachelor's degree in engineering, computer science, or other STEM field (or equivalent full-time professional experience) 7+ years of full-time professional experience Ability to travel up to 10% of the time as needed Experience with virtualization technologies (e.g., VMware vSphere, Microsoft Hyper-V). Familiarity with network management, including TCP/IP, DNS, DHCP, VLANs, and firewalls. Proficiency with backup and disaster recovery solutions. Solid experience with PowerShell or Bash scripting for automation. What Makes You Stand Out: Exceptional problem-solving and analytical skills. Ability to manage multiple complex projects simultaneously under tight deadlines. Strong verbal and written communication skills for documentation and collaboration with technical and non-technical staff. Proactive mindset with a commitment to continuous improvement and learning new technologies. Customize preferred skills Experience with virtualization technologies (e.g., VMware vSphere, Microsoft Hyper-V). Familiarity with network management, including TCP/IP, DNS, DHCP, VLANs, and firewalls. Proficiency with backup and disaster recovery solutions. Solid experience with PowerShell or Bash scripting for automation. Demonstrated experience managing enterprise environments using PDQ Deploy or Tanium If you see yourself reflected in this role and are excited about the impact you could make, we encourage you to apply! If you know someone who may be a great fit, please feel free to share this opportunity with your network. Pay Range*: $135,000 - $231,000or $164,000 - $273,000 This amount may not be reflective of actual compensation that may be earned as pay is dependent on a candidate's experience, skills, and education. The posted range does not include bonuses, commissions, tips, or other benefits. IDT is often looking to place multiple candidates at various levels. Therefore, more than one pay range has been included, commensurate with experience. About Innovative Defense Technologies (IDT): Leveraging advanced software automation, model-based systems engineering (MBSE), and AI-driven capabilities, IDT accelerates capability development, enhances operational readiness, and reduces lifecycle costs for the Department of Defense. We are dedicated to transforming defense systems through innovation, efficiency, and mission-critical results. At IDT, our employees are developing advanced mission-critical outcomes by consistently delivering high-quality results, fostering innovation, applying rigorous problem-solving, and communicating effectively across multifaceted teams and stakeholders. Grounded in these competencies, IDT translates complex customer and product requirements into robust software solutions. Why Work at Innovative Defense Technologies (IDT): IDT is a growing company with a vibrant, entrepreneurial culture. We are headquartered in Arlington, VA with additional offices in Fall River, MA; Mount Laurel, NJ; and San Diego, CA. At each location, our employees work together in a modern, snack-filled, and social office space, designing innovative solutions for our defense industry customers. We offer employees competitive pay and benefits including: Generous benefits package Competitive PTO Paid holidays 401(k) with immediate vesting and matching 9/80 optional schedule (2nd and 4th Friday off every month) Tuition Assistance Reimbursement Program Professional Development Resources Pre-Tax Commuter Benefits Organization-Wide Monthly Tech Connect Events Annual Employee Recognition Awards Regular Social Events and Catered Lunches EEO Statement: IDT is an Equal Opportunity employer.