Senior Systems Administrator

STR is looking for a Senior Systems Administrator who can take ownership of core enterprise applications while also supporting the broader IT infrastructure that keeps the company running. This role is hands-on, collaborative, and central to maintaining the reliability, performance, and security of STR’s systems, applications, and cloud environments.

 What You’ll Do:

 Manage, maintain, and enhance key enterprise platforms including GitLab, Jira, Confluence, Teamwork Cloud, and Syndeia.

• Perform upgrades, patches, monitoring, integrations, and troubleshooting across applications and systems.
• Support Linux, Windows, and VMware environments, as well as cloud-based infrastructure (AWS, Azure, or similar).
• Collaborate with development and engineering teams to understand requirements, improve workflows, and maintain seamless CI/CD and collaboration toolchains.
• Configure and optimize applications, access controls, authentication integrations (LDAP/AD), and automation workflows.
• Troubleshoot complex interactions across servers, networks, storage, and databases in partnership with other technical teams.
• Support disaster recovery planning, business continuity objectives, and high-availability initiatives for critical systems.
• Participate in infrastructure projects, change planning, documentation, and ongoing improvement of STR’s enterprise environment.
• Contribute to security best practices, vulnerability remediation, and compliance across applications and systems.
• Work with vendors and internal teams to resolve issues, refine architecture, and implement new capabilities.

What You Bring: 

• 7–10+ years of hands-on experience in systems or applications administration.
• High school diploma or equivalent.
• Ability to obtain a security clearance for which U.S. citizenship is required 
• Strong background with one or more enterprise application platforms (GitLab, Jira, Confluence preferred).
• Solid experience with Linux/Unix and Windows administration.
• Familiarity with virtualization (VMware/vSphere), networking fundamentals, and authentication services (AD, LDAP).
• Scripting experience (Bash, Python, or PowerShell).
• Strong analytical, troubleshooting, documentation, and communication skills.
• Ability to work autonomously, collaborate cross‑functionally, and support a fast‑paced technical environment.

 Nice to Have: 

• Experience with Docker/Kubernetes or configuration management tools (Ansible, Puppet).
• Experience with Teamwork Cloud, Syndeia, or other engineering collaboration systems.
• DoD 8570 certifications (Security+, CISSP, etc.).
• Active Secret Clearance

Why STR

You’ll be part of a high‑impact IT organization supporting mission‑critical programs in national security. The work is meaningful, the technology is modern, and the environment is collaborative and fast‑moving.

Pay Information 

Full-Time Salary Range:  $137,000 to $170,000

The salary range listed is based on external market data. Offers are based on factors, such as but not limited to, the candidate’s experience, education, training, key skills/critical skills, security clearances, and prevailing market and business conditions. 

STR is a growing technology company with locations near Boston, MA, Arlington, VA, near Dayton, OH, Melbourne, FL, and Carlsbad, CA. We specialize in advanced research and development for defense, intelligence, and national security in: cyber; next generation sensors, radar, sonar, communications, and electronic warfare; and artificial intelligence algorithms and analytics to make sense of the complexity that is exploding around us.

STR is committed to creating a collaborative learning environment that supports deep technical understanding and recognizes the contributions and achievements of all team members. Our work is challenging, and we go home at night knowing that we pushed the envelope of technology and made the world safer.

STR is not just any company. Our people, culture, and attitude along with their unique set of skills, experiences, and perspectives put us on a trajectory to change the world. We can't do it alone, though - we need fellow trailblazers. If you are one, join our team and help to keep our society safe! Visit us at www.str.us for more info.

STR is an equal opportunity employer. We are fully dedicated to hiring the most qualified candidate regardless of race, color, religion, sex (including gender identity, sexual orientation and pregnancy), marital status, national origin, age, veteran status, disability, genetic information or any other characteristic protected by federal, state or local laws.

If you need a reasonable accommodation for any portion of the employment process, email us at appassist@str.us and provide your contact info.

Pursuant to applicable federal law and regulations, positions at STR require employees to obtain national security clearances and satisfy the requirements for compliance with export control and other applicable laws.