Security System Administrator (TS/SCI/Polygraph)

Administrative & Support Services | GPS Operations

Rosslyn, Virginia, United States

Position Summary

Deloitte is hiring Security System Administrators to support the firm's clients in the Chantilly, VA and the National Capital Region.

TS/SCI/Polygraph security clearance is preferred.

The position will support Deloitte's Government & Public Services (GPS) security program with a primary responsibilities for all aspects of classified systems administration including infrastructure, applications, databases, and telecommunications. Additional responsibilities, include documenting and supporting accreditations, configuring, coordinating, controlling, maintaining, troubleshooting, securing, continuous monitoring and developing specialized system security processes procedures. 

The System Administrator performs systems security administration functions, i.e. creating user accounts; monitoring and managing system resources, log files, CPU and disk usage, performing backups, performing systems backup and recovery procedures; hardware/software inventory; writing or modifying basic scripts to resolve performance problems; maintaining system documentation and logs; performing or assisting in troubleshooting problems; maintaining network security including application security; anti-virus, user authentication; and keeping abreast with current security technologies, applicable laws and regulations in support of Intelligence Community (IC) clients located in a Sensitive Compartmented Information Facility (SCIF).

The candidate will join a team of professionals with primary responsibility for classified information technologies in Arlington, VA, Annapolis Junction, MD, and the National Capitol Region while providing additional backup and surge support for other locations in Fairfax County and occasional travel within the US.

Work You’ll Do

  • Performing day-to-day Local Area Network systems administration. 
  • Defining and implementing local system and operational policies and procedures in coordination and with concurrence of the ISSM.
  • Perform patching, antivirus scans, antivirus definition updates, performance tuning, troubleshooting, and backup.
  • Resolve desktop problems and service requests such as software installs. 
  • Establish and maintain preventive maintenance schedules.
  • Establishing system specifications by conferring with users; analyzing workflow, access, information, and security requirements.
  • Assist with installation and setup of new hardware, including desktops, servers, and networking equipment.
  • Incident response: collaborates internally and externally to develop and support operational procedures to mitigate risks related to classified data spills, intrusions and unauthorized accesses within Federal compliance guidelines relative to specific Federal agency clients to maintain system integrity and availability.
  • Printer Maintenance and support.
  • Strong verbal and written skills required providing management status reports and documented system changes.
  • Implement baseline changes under tech lead oversight.



  • Active TS/SCI with Polygraph security clearance 
  • Bachelor's degree, however Associates degree coupled with work experience may be accepted in lieu of Bachelors degree.
  • Four (4) years of experience in a network/software/hardware support and/or systems administrator role.
  • DoD Directive 8570.01 Certification Requirements for IAT level 1, Microsoft Certified Solutions Expert (MCSE) or Microsoft Certified Solutions Associate (MCSA) with emphasis in Windows Server 2012/2016 and Windows 10.
  • Limited travel may be required to other Deloitte (U.S.) locations outside of the greater Washington-DC area
  • Technical knowledge of security system controls, policies, technical security safeguards, and operational security measures to include various government security requirements and working knowledge of 32 CFR, NIST, CMMC and ICD 503.
  • Virtualization technologies, such as VMware, Citrix, or Microsoft Virtual Server/Hyper-V.
  • Team player and can work in a fast-paced environment.
  • Candidates should have Tier 1-2 administrative experience and user support.
  • Experience administering Windows Server 2012/2016, Windows10 and Linux environments.
  • Experience configuring and maintaining Active Directory in various Windows Environments.
  • Experience troubleshooting hardware & software related issues.
  • Demonstrated ability to work both independently and collaboratively with a team.
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As used in this posting, “Deloitte” means Deloitte LLP. Please see for a detailed description of the legal structure of Deloitte LLP and its subsidiaries.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or protected veteran status, or any other legally protected basis, in accordance with applicable law.

Requisition code: 156502


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