Systems Administrator - AWS

** Description*
* ** Leidos
* * has a new and exciting opportunity for a  
** Systems Administrator
** in our  
** Intelligence Sector, Cyber & Analytics Business Area (CABA)** . Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At  
** Leidos** , we offer  
** competitive benefits** , including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more.  
** Join us and make a difference in National Security!*
* ** This position is eligible for a $10k sign on bonus!*
* ** Job Summary*
* The ideal candidate brings deep hands-on Linux administration experience and is comfortable supporting mission-critical Development, Test, and Production environments using command-line tools, system logs, automation, and established change-management processes. The Linux Systems Administrator will serve as a senior technical resource responsible for system configuration, automation, security hardening, vulnerability remediation, monitoring, troubleshooting, and continuous improvement of Linux-based infrastructure and operational practices.

** Primary Responsibilities*
* + Administer, configure, secure, monitor, and troubleshoot RHEL/Linux systems across Development, Test, and Production environments supporting mission-critical workloads.

+ Lead troubleshooting and root-cause analysis across operating systems, applications, storage, authentication, performance, and network connectivity using Linux command-line tools, system logs, and monitoring platforms.

+ Manage Linux system lifecycle activities including account and permission administration, patching, package management, software installation, service configuration, upgrades, and ongoing system maintenance.

+ Implement and maintain Linux security controls, hardening standards, vulnerability remediation, configuration baselines, and compliance requirements.

+ Develop and maintain automation and configuration-management solutions using Ansible, Bash, Python, or comparable technologies to improve consistency, reliability, and operational efficiency.

+ Independently research and resolve complex technical issues while collaborating with SAs, DBAs, SWEs, SEs, testers, and other team members to develop sustainable solutions and promote knowledge sharing across the team.

+ Develop and maintain technical documentation, SOPs, operational runbooks, system configurations, and change records, and participate in rotational on-call support for the mission environment.

** Basic Qualifications*
* + Bachelor's degree in a technical discipline from an accredited college or university and Eight (8) years of related experience. Five (5) years of additional related experience may be substituted for a bachelor's degree.

+ Extensive hands-on Linux systems administration experience, including RHEL or comparable enterprise Linux distributions, supporting complex production environments.

+ Experience administering Linux systems including accounts and permissions, package management, patching, system services, storage, authentication, system configuration, and performance monitoring.

+ Hands-on experience with automation or configuration management using Ansible or comparable technologies, along with Bash and/or Python scripting.

+ Strong Linux troubleshooting skills and knowledge of networking fundamentals including DNS, TCP/IP, IP addressing, ports, routing, and firewalls.

+

Experience with Linux security hardening, vulnerability remediation, configuration management, and formal change-control processes.

+

Experience with AWS, including EC2, ECS (Elastic Container Service), EKS (Elastic Kubernetes Service), Systems Manager (SSM), Cloud Formation, and associated monitoring and operational services.

+  
** Security Clearance Requirement:
Active TS/SCI with polygraph.*
* ** Desired Qualifications*
* + Advanced experience with Ansible and RHEL 9, including automated configuration, provisioning, and repeatable system administration.

+

Experience with AWS, including EC2, Systems Manager (SSM), Cloud Formation, and associated monitoring and operational services.

+

Experience with FIPS, SELinux, fapolicy, STIG requirements, vulnerability remediation, and Linux security controls.

+

Experience with PKI, including…