Senior Linux System Administrator

ASEC • Patuxent River, MD

119d • $130,000 - $150,000

About The Position

As the Senior Linux System Administrator, you will be responsible for ensuring secure configurations, producing accreditation artifacts, and maintaining hardened baselines — all with a focus on reliability and long-term system assurance. The ideal candidate is not only technically strong, but also thoughtful, process-oriented, and one who takes a careful, methodical approach to systems management.

Requirements

• Bachelor’s degree in Computer Science, Information Systems Management, or related IA/CS field from an ABET-accredited institution; in lieu of degree, an additional 3 years of IT experience on DoD classified networks is required.
• 7 years of related System Administration experience is required; 10+ years with no bachelor's degree.
• Must have a deep level of knowledge and experience with Red Hat Enterprise Linux (RHEL).
• Demonstrated experience with Confluence and Jira.
• Familiarity with SolarWinds monitoring and auditing tools.
• Familiarity with the Red Hat Ansible Automation Platform.

Nice To Haves

• Ability to establish and maintain positive relationships with internal and external customers.
• Possess professional and effective communication skills, both verbal and written.
• Proactive approach to work and able to accomplish tasks with limited guidance and supervision.
• Demonstrated critical thinking and problem-solving skills.
• Strong organizational skills to manage competing priorities.

Responsibilities

• Ensuring secure and compliant Linux operating system configurations by applying Defense Information Systems Agency (DISA) Security Technical Implementation Guides (STIGs) to prevent misconfiguration and audit issues.
• Managing vulnerability assessments with Assured Compliance Assessment Solution (ACAS) and EvaluateSTIG, producing accreditation artifacts to maintain Authorization to Operate (ATO) compliance and demonstrate security assurance.
• Maintaining and securing VMware ESXi hypervisors, including patching and hardening host systems to ensure platform reliability.
• Automating all routine administrative tasks — including provisioning, configuration management, patching, compliance checks, and reporting — using Red Hat Ansible Automation Platform, improving consistency and reducing manual error.
• Applying Red Hat Enterprise Linux (RHEL) updates on a monthly basis to maintain a secure, up-to-date environment.
• Refining processes to align with policy, reduce overhead, and collaborating with DevOps and security teams to support modern automation practices.
• Releasing RHEL hardened system templates on a quarterly basis with required documentation and ATO submission, ensuring standardized and compliant deployments.
• Monitoring Linux and ESXi environments for performance, availability, and security issues to sustain system health and resilience.
• Supporting Risk Management Framework (RMF) compliance (FISMA, NIST 800-53, DoD SRG), ensuring alignment with policy and accreditation requirements.
• Maintaining accurate technical documentation in Confluence and using Jira Software for task tracking, ensuring procedural clarity and reducing knowledge gaps.
• Operating and maintaining SolarWinds monitoring and auditing tools to proactively detect anomalies and maintain system integrity.

Benefits

• Comprehensive benefits package (11 paid holidays, medical/dental/vision insurance, HSA/FSA, disability insurance, and more!)
• 401K match
• Tuition assistance (undergraduate and graduate)
• Veteran friendly
• Thriving employee culture
• Employee discount program

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: Bachelor's degree
• Number of Employees: 101-250 employees