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Senior System Administrator

Hackajob

Hackajob

Software Engineering, IT
United States · Virginia, USA · Chantilly, VA, USA
Posted on Mar 16, 2026
hackajob is collaborating with MANTECH to connect them with exceptional professionals for this role.

MANTECH seeks a motivated, career and customer-oriented Senior Systems Administrator to join our team in Chantilly, VA. This is a full-time onsite position.

Responsibilities Include, But Are Not Limited To

  • Providing Tier II IT Systems support on a wide range of technologies, including: VMware vCenter, Horizon View, Site Recovery Manager, SolarWinds, Cisco Catalyst Center (DNAC), GEMOne, HP SANs, Certificate Services, DHCP, DNS, Active Directory, Group Policies and Microsoft Windows Operating Systems
  • Diagnosing and resolving the performance, security, and/or technical challenges related to the platforms listed above
  • Writing Standard Operating Procedures (SOPs) to accomplish repetitive tasks
  • Participating in processes throughout all phases of the ITIL Service Lifecycle, including submitting Change Requests
  • Performing requirements analysis, requirements gathering, and integration for all platforms listed above
  • Providing direction and guidance to less-experienced Systems Engineers
  • Investigating and resolving operational problems in conjunction with other engineering and technical personnel
  • Working on project teams responsible for engineering and packaging releases to integrate within the customer’s production IT environment
  • Willingness to occasionally work after normal duty hours (nights and weekends) to support system maintenance or service outages

Minimum Qualifications

  • Bachelor’s degree and 5+ years of IT experience
  • DoD 8570 IAT Level II/8140 level Intermediate Certification required, ex., Security+, SecurityX
  • DoD 8570 computing environment certification required within 6 months of hire ex., MCSA, VCP, or equivalent
  • Experience with Microsoft Windows 2008/2012/2016/2019 Servers; Microsoft Windows 10; administering Microsoft Exchange, Active Directory, and workstation and server hardware; administering Microsoft Office 2010/2016; administering DNS, Group Policy, and PKI; administering vSphere, Horizon View, data backup, and antivirus software; basic networking including DHCP/TCPIP
  • CISCO networking devices
  • TACLANE encryption devices
  • Knowledge of Microsoft Windows Systems, VMWare, and CISCO systems

Preferred Qualifications

  • Master’s degree in Information Technology or a related field
  • Good working knowledge of Microsoft Windows systems, including DNS, Group Policy, and PKI
  • Good working knowledge of applying security best practices from DISA and/or vendors.
  • Knowledge of Microsoft Office
  • Basic networking
  • Experience using a Service Desk ticketing system, such as Remedy or ServiceNow
  • ITIL Foundations certification.
  • Scripting experience or willingness to learn.

Security Clearance Requirements

  • Must have a current or active Top Secret security clearance, and be willing and able to obtain a polygraph

Physical Requirements

  • The person in this position must be able to remain in a stationary position 50% of the time. Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations.