Linux System Administrator, Senior

Peraton•San Antonio, TX

62d

About The Position

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

Requirements

20+ years as a Linux System Administrator on projects of similar scope and complexity
Proven ability to plan and lead system administration efforts
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
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

Nice To Haves

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.

Responsibilities

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