Apply Now    

Senior Linux System Administrator - Must Have Active Secret Clearance

Req #: 245188
Location: Linthicum, MD US
Job Category: Information Technology
Minimum Clearance Required: Secret

Job Description


  • This is a Senior System Administrator position located in Linthicum, Maryland supporting a transitioning network security platform. Ideal candidates will have previous experience as an IT specialist or Systems Administrator supporting a complex platform on unclassified, FOUO, Secret and Top Secret networks


  • Install, repair, upgrade, and maintain Linux and Windows-based computer systems and infrastructure, including but not limited to, workstations, servers, network switches,  and cabling.
  • Develop, implement and enforce IT policies and procedures, including those for security, standards, and service provision.
  • Monitor network systems, including traffic, inbound & outbound queues, server metrics, storage space, and implement efficiency improvements.
  • Maintain, troubleshoot, and implement network security tools including firewalls, anti-virus, and vulnerability scanning.
  • Provide systems engineering and technical support for the establishment, test, upgrade, and operational support of systems, network, workstations, and support equipment hardware and software.


Examples of specialized experience would typically include, but are not limited to the following:

  • Experience working with Linux servers and workstations based on distributions such as Red Hat or CentOS
  • Experience working with Windows 10
  • Experience working with Microsoft Windows server, switches, and firewalls
  • Experience managing Apache-based web services
  • Experience working with virtualization technologies such as VMware (preferred),  Citrix,  or Hyper-V
  • Experience managing and securing computer accounts, privileges, and access to systems and equipment in accordance with DOD Security Technical Implementation Guides (STIG); monitoring network systems, including traffic, inbound & outbound queues, server metrics, storage space, and implementing efficiently improvements
  • Experience working with, JWICS, SIPR
  • Familiarity with NFS, HTTP, HTTPS, and SFTP protocols, and STIG standards; AND
  • Experience working with  Unix shell or Ansible
  • Performing system data management and protection (data backup, archiving, and data restores)
  • Configuring, monitoring, and maintaining Network Attached Storage (NAS) hardware.


  • Minimum Bachelor's degree in Information Technology
  • DoD 8570 IAT Level III Approved Certifications and industry recognized IT/cybersecurity training
  • Must possess SECRET clearance at time of hire

In addition to meeting specialized experience, applicants must also show proficiency in IT-related experience demonstrating each of the four competencies listed below:

  • Attention to Detail- Is thorough when performing work and conscientious about attending to detail.
  • Customer Service - Works with clients and customers (that is, any individuals who use or receive the services or products that your work unit produces, including the general public, individuals who work in the agency, other agencies, or organizations outside the Government) to assess their needs, provide information or assistance, resolve their problems, or satisfy their expectations; knows about available products and services; is committed to providing quality products and services.
  • Oral Communication - Expresses information (for example, ideas or facts) to individuals or groups effectively, taking into account the audience and nature of the information (for example, technical, sensitive, controversial); makes clear and convincing oral presentations; listens to others, attends to nonverbal cues, and responds appropriately.
  • Problem Solving - Identifies problems; determines accuracy and relevance of information; uses sound judgment to generate and evaluate alternatives, and to make recommendations.


  • Local off-site travel up to 1x per week within the  Washington, DC area to include but not limited to Fort Meade, Maryland; Pentagon, Virginia; Quantico, Virginia; Chantilly, Virginia; and Arlington, Virginia

Job Location



CACI employs a diverse range of talent to create an environment that fuels innovation and fosters continuous improvement and success. At CACI, you will have the opportunity to make an immediate impact by providing information solutions and services in support of national security missions and government transformation for Intelligence, Defense, and Federal Civilian customers. CACI is proud to provide dynamic careers for employees worldwide. CACI is an Equal Opportunity Employer - Females/Minorities/Protected Veterans/Individuals with Disabilities.

Apply Now