Demo

Senior Systems Administrator (Unix/Linux)

ATG
Dahlgren, VA Full Time
POSTED ON 9/28/2026
AVAILABLE BEFORE 10/28/2026
Employment Type: Full-Time
Shift: Day

** This position is contingent upon award of the contract.

About the Company
Athena Technology Group, Inc. (ATG) is a Service-Disabled Veteran Owned Small Business (SDVOSB) focused on Information Technology and Communications consulting, system engineering, integration, deployment and operation of state of the art command and control and information systems that deliver critical network centric solution to the warfighter. With a proven track record of technical support to our customers, we are looking for innovative industry professionals to join our team.

ATG is an Equal Opportunity/Affirmative Action Employer Minorities/Females/Vets/Disability

Job Summary
ATG is seeking a Senior Systems Administrator (Unix/Linux) to support NSWCDD Code 104. The selected candidate will administer, secure, maintain, and optimize enterprise Unix and Linux server environments supporting mission-critical Department of the Navy systems. The role includes systems administration, patch management, automation, performance tuning, cybersecurity compliance, and operational support.

Key Responsibilities
  • Install, configure, administer, and maintain Red Hat Enterprise Linux and other Unix/Linux operating systems.
  • Perform system hardening, STIG implementation, patch management, and vulnerability remediation.
  • Monitor server performance, availability, and capacity while resolving complex system issues.
  • Manage user accounts, file systems, storage, permissions, and system backups.
  • Develop and maintain shell scripts and automation to improve system administration processes.
  • Support RMF, continuous monitoring, and cybersecurity compliance activities.
  • Coordinate maintenance activities with Government stakeholders and technical teams.
  • Prepare technical documentation, SOPs, and system configuration records.
Qualifications
Required:
  • Master's degree in Information Technology, Computer Science, or related field.
  • Minimum seven (7) years of professional systems administration experience, including Unix/Linux environments.
  • Current DoD 8570/8140 IAT Level III certification.
  • Ability to obtain and maintain a Tier 5 investigation.
  • Experience with Red Hat Enterprise Linux, shell scripting, virtualization, and enterprise server administration.
  • Knowledge of STIGs, RMF, and NIST security requirements.
  • U.S. Citizenship.
Desired:
  • Red Hat Certified System Administrator (RHCSA) or RHCE certification.
  • Experience supporting NAVSEA or Department of the Navy.
  • Experience with VMware, Ansible, or enterprise automation tools.
Physical and Environmental Conditions
Normal Office Environment. Requires Sitting, Standing, Near Acuity, Speaking with colleagues and customers, Listening, Sight, Use of hands/fingers.

Additional Benefits
  • Performance Bonuses and annual salary reviews
  • Health, dental, and vision insurance
  • Short Term Disability, Long Term Disability, and Life Insurance
  • 401(k) plan with company match
  • Opportunities for professional growth and development
  • A collaborative and inclusive work environment

ATG is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, religion, creed, color, national origin, ancestry, sex (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, medical condition, marital or domestic partner status, sexual orientation, gender, gender identity, gender expression and transgender status, mental disability or physical disability, genetic information, military or veteran status, citizenship, low-income status or any other status or characteristic protected by applicable law. Learn more about your rights under Federal EEO laws and supplemental language

Salary.com Estimation for Senior Systems Administrator (Unix/Linux) in Dahlgren, VA
$101,428 to $127,229
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