Linux System Administrator, Senior

Senior Linux System Administrator
Location: San Antonio, TX
Clearance Required: TS/SCI with Polygraph

Your Mission:

Peraton is seeking a Senior Linux System Administrator to support our high-impact Cyber Intelligence team in San Antonio, TX. Join us at the forefront of national security as you help operate and secure critical cloud-based repositories in a fast-paced, mission-driven environment where your skills directly support global operations.

This role is ideal for someone who thrives in dynamic environments, enjoys solving complex technical problems, and is passionate about contributing to real-world cybersecurity missions.

What You’ll Do:

You’ll work hands-on with large-scale Hadoop and Accumulo clusters, helping maintain the stability, performance, and security of our cloud systems. Your responsibilities will include:

• Monitoring and maintaining system health across distributed environments

• Troubleshooting hardware, software, and network issues

• Sustaining and optimizing storage systems

• Collaborating with hardware, software, security, and infrastructure teams

• Automating tasks and managing configurations using tools like Puppet, Bash, and Python

• Providing after-hours support as needed for mission-critical issues

• Ensuring compliance with system security requirements

• Participating in system design and architecture discussions

• Maintaining system scripts, patching software, and managing user accounts

• Keeping accurate hardware and system inventories

Who You Are:

You’re a proactive, skilled Linux system administrator with a strong background in:

• Operational troubleshooting of cloud-based systems and large-scale distributed clusters

• Tools such as Hadoop, Accumulo, and experience managing cloud infrastructure

• Scripting and automation using Bash, Python, or other scripting languages

• Configuration management with Puppet (or similar tools)

You understand that requirements can shift quickly and are ready to adapt in real time to global operational needs.

Why Peraton?

At Peraton, you won’t just maintain systems—you’ll safeguard missions. You’ll work alongside passionate professionals who are dedicated to protecting the nation through advanced technology and innovation. We offer competitive compensation, a comprehensive benefits package, and opportunities to grow your career while making a difference.

Job Requirements:

• Experience:

  • 20+ years as a Linux System Administrator on projects of similar scope and complexity

  • Proven ability to plan and lead system administration efforts

• Education:

  • Bachelor’s degree in System Engineering, Computer Science, Information Systems, Engineering, or a related field

  • May substitute 5 additional years of experience in place of degree

• Security Clearance:

  • Active TS/SCI with current polygraph required

• Technical Expertise in:

  • Designing and implementing Service-Oriented Architecture (SOA) solutions

  • Developing DoDAF-compliant architectures, including operational, technical standards, and system/service views

  • Leading end-to-end system trade analyses to optimize long-term system performance

  • Applying models, simulations, and prototyping to manage risk and lower development costs

  • Managing system configurations throughout lifecycle (hardware, software, and documentation)

  • Creating design alternatives that factor in cost, complexity, reuse, risk, and scalability

  • Developing and monitoring risk mitigation plans, including fallback strategies using EVM data

  • Supporting Analysis of Alternatives (AoA) efforts with well-justified solution recommendations

  • Providing technical leadership across the full system development lifecycle—from requirements gathering through integration and testing

Peraton offers enhanced benefits to employees working on our critical National Security programs, which include heavily subsidized employee benefits coverage for you and your dependents, 25 days of PTO accrued annually up to a generous PTO cap and eligible to participate in an attractive bonus plan.

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Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can’t be done by solving the most daunting challenges facing our customers. Visit peraton.com to learn how we’re keeping people around the world safe and secure.