Senior Linux System Administrator

ASEC • Patuxent River, MD

2d • $130,000 - $150,000 • Onsite

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, and 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.
• Candidates must hold a current IAT-II certification (e.g., Security +, CCNA Security, CySA+) as defined by DoD 8570.01-M.
• Candidates must also have a current Operating System certification (e.g., Windows Server, Linux+, Red Hat Certified System Administrator, etc.).
• This position requires U.S. citizenship and an active DoD Top Secret clearance. Selected candidate will be subject to a government security investigation and must meet eligibility requirements for access to classified information.

Nice To Haves

• Familiarity with SolarWinds monitoring and auditing tools.
• Familiarity with the Red Hat Ansible Automation Platform.
• Ability to build positive, collaborative relationships across teams and with external partners.
• Effective communicator with strong verbal and written skills.
• Proactive, self-directed work style with the ability to operate independently.
• Analytical thinker with proven problem-solving capabilities.
• Highly organized, with the ability to balance competing priorities in a fast-paced environment.

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

• 100% employee-owned company. Learn more about our Employee Stock Ownership Plan (ESOP) here!
• Comprehensive benefits package, including 11 paid holidays, medical/dental/vision coverage, HSA/FSA options, disability insurance, and more!
• 401(k) with company match
• Tuition assistance for undergraduate and graduate education
• Veteran-friendly employer
• Thriving employee culture

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Number of Employees: 101-250 employees