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Systems Administrator

Signature Science, LLC
United States, Virginia, Charlottesville
1670 Discovery Drive (Show on map)
Aug 21, 2025

Position Purpose:

The Systems Administrator assists with and supports the planning, design, installation, implementation, and maintenance of servers, endpoint devices, and services operated exclusively on behalf of external clients.

Essential Duties & Responsibilities:




  • Configure, harden (STIG), operate, and maintain servers, desktops, and network systems to meet requirements defined in RMF ICD-703, NISPOM, NIST SP 800-171, NIST SP 800-53, and the DHS 4300 Sensitive Systems Handbook in support of assigned project(s).
  • Maintain Active Directory Domain Services, DNS, DHCP and WSUS services for assigned project(s).
  • Configure and maintain Windows Hyper-V and VMWare vSphere hosts, clusters, and virtual servers for assigned project(s).
  • Configure and maintain Microsoft SQL Server Always On Availability Cluster.
  • Maintain enterprise backup solutions to ensure reliable backup and restoration of project servers.
  • Update all firmware and software of all project systems in an offline environment.
  • Anticipate, mitigate, and communicate any potential impacts of changes to ensure service availability.
  • Design, quote, build and develop test plan procudures for new IT infrastructure or systems implementations for assigned project(s).
  • Document all changes and solutions to problems in a centralized knowledge base.
  • Maintain system and user documentation per Authority to Operate (ATO) requirements.
  • Serve as a Subject Matter Expert to explain technical issues to customers and users.
  • Conduct NESSUS scans, create checklists, and apply vulnerability remediations.
  • Mange several custom applications, including patching and fixing with developer assistance if issues arise.



Required Knowledge,Skills, & Abilities:




  • Experience configuring and maintaining IT systems required to meet RMF ICD-703, NIST SP 800-53, NIST SP 800-171, DHS 4300 Sensitive Systems Handbook, and NISPOM requirements.
  • In-depth knowledge of Windows Core Services (e.g., DNS, DHCP, AD DS, Kerberos, AD RMS/IRM, Hyper-V, PKI/Certificates, FTP, IIS, etc.).
  • Strong written and verbal communication skills to enable efficient and effective exchanges with users and customers, producing clear and accurate documentation.
  • High attention to detail.
  • Ability to manage multiple tasks simultaneously.


Preferred:




  • Experience administering IT systems in classified environments and supporting systems with both classified and unclassified designations. Familiarity with VMware NSX or other network virtualization technologies.
  • Experience with automation scripting (PowerShell, Python, etc.) for system administration tasks.
  • Knowledge of Zero Trust Architecture principles and implementation.
  • Experience with patch management and vulnerability scanning in offline or air-gapped environments.
  • Familiarity with cloud environments such as Azure Government or AWS GovCloud.
  • Prior work supporting DoD, DHS, or Intelligence Community programs.



Education/Experience:




  • Bachelor's Degree in Information Technology, Computer Science, or a related field required. Four years of professional IT experience may be substituted in lieu of a degree.
  • Minimum of six years of experience working in an IT-related role. If professional experience is substituted for education, a total of at least ten years of experience is required.


Certificates/Licenses:




  • Required to possess (or obtain within 90 days of hire) a current and valid SecurityX (formerly CASP+) certification to comply with DoD 8140 requirements for the Systems Administrator (Advanced) Work Role. The following certifications will also meet the requirement: CCNP Security, CCSP, FITSP-O, or GFACT.
  • Preference will be given to candidates with an active and valid certification.


Clearance:




  • Must be willing and able to successfully complete a background investigation for a security clearance and counterintelligence (CI) polygraph examination.
  • Active TS/SCI security clearance preferred.


Working Conditions/Equipment:




  • Primary work performed in an office environment; must be flexible to work nights and weekends as needed to meet deadlines.
  • Must be able to safely lift and carry up to 50 lbs of IT equipment, including servers and rack-mounted hardware, as required.
  • May occasionally be required to perform work in laboratory environments in accordance with established safety protocols.
  • Ability to remain seated at a computer workstation for extended periods.



The above job description is not intended to be an all-inclusive list of duties and standards of the position. Incumbents will follow any other instructions, and perform any other related duties, as assigned by their supervisor.



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