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Senior System Administrator (DECIMATE)

Department: Epsilon C5I
Location: San Diego, CA

Epsilon C5I (, focused on software development and systems engineering for complex command, control, intelligence and combat systems, is seeking a Senior System Administrator for work in San Diego, CA. Our engineering efforts provide the warfighter with common enterprise solutions to improve information sharing and combat effectiveness. If you have a passion for excellence in engineering and enjoy working on challenging projects in a fast-paced, team-oriented environment read on!


Our ONR software team employs an Agile Scrum process to rapidly design, code, and integrate capabilities into a mature Platform as a Service (PaaS) solution. Work involves troubleshooting, securing LINUX operating systems and networks, and securing containers and container platforms. The ideal person would be interested in System Architecture and Security, while also interested in the nitty gritty of security and system access control.

Duties and Responsibilities:

  • Secure and troubleshoot LINUX operating systems and networks using SELinux and other access controls
  • Have a deep understanding of operating systems and provide guidance on how to secure systems and networks.
  • Write Bash or Python scripts to automate securing the network, containers, and operating systems
  • Automate securing and containerizing applications.
  • Implement SELinux for a Multi-Level Security environment

Required Qualifications:

  • Bachelor of Science degree in Computer Science or related discipline (e.g. Software Engineering, Computer Engineering)
  • Eight (8) or more years of professional experience involving System Networking and Administration
  • Hands on experience with troubleshooting Linux operating systems and networks
  • A deep understanding of networking and operating system security and access control (understand how system is implemented, understand how containers are implemented, namespaces, polyinstantiation, Netlabels, Socket Labels, IPSec, etc.)
  • Ability to write Bash or Python scripts.
  • Ability to work individually and on team projects in an environment of teamwork and cooperation.
  • Effective written, oral, and presentation skills.
  • Ability to obtain US Secret Clearance (Interim SECRET or above)
  • Pursuant to the various government contractual requirements, all applicants must be U.S. Citizens.
  • Pursuant to Company policy, candidates must be able to provide proof they have received the COVID 19 vaccine and are considered fully vaccinated. Requests for an accommodation due to a medical or religious reason can be made by contacting Human Resources.


Preferred Qualifications:

  • Ability to troubleshoot technical problems in a RedHat infrastructure environment.
  • Ability to troubleshoot networking problems in an on-premise environment as well as in AWS.
  • Familiarity with OpenShift, Docker, Helm.
  • Familiarity with DNS, LDAP, PKI, and other infrastructure services.
  • Familiarity with SELinux and Multi-Level Security architectures
  • Experience with Virtual Machines, RedHat Enterprise Linux (RHEL), AWS, and Containers.
  • Experience with Scripting and Deployment Languages (Python, Bash, Ansible, Terraform)
  • Experience implementing access controls (DAC, MAC, RBAC)


ADA Notations:

  • Regular communication (hearing/speaking).
  • Noise conditions range from very quiet to very noisy.
  • Prolonged use of computer (typing/keyboarding).
  • Frequently required to sit for long periods of time, stand, walk, and may occasionally lift and move at least 25 pounds.
  • Ability to travel by car, air or other means of transportation, if required.

Epsilon Systems Solutions, Inc. and its subsidiaries are proud to be Equal Employment Opportunity and Affirmative Action employers, Minority/Female/Disabled/Veterans.

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