Linux System Administrator, Senior

Linux System Administrator, Senior

Job Locations

US-TX-San Antonio

Requisition ID

2025-159090

Position Category

Information Technology

Clearance

Top Secret / SCI w / Poly

Sector

Cyber Mission

Responsibilities

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.

Qualifications

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 Overview

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.

Target Salary Range

$190,000 - $304,000. This represents the typical salary range for this position. Salary is determined by various factors, including but not limited to, the scope and responsibilities of the position, the individual's experience, education, knowledge, skills, and competencies, as well as geographic location and business and contract considerations. Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay.

EEO

An Equal Opportunity Employer including Disability / Veteran.