Senior Systems Administrator

MANTECH seeks a motivated, customer-oriented Senior Systems Administrator to join our team in Chantilly, VA.  This is an onsite position.Responsibilities include but are not limited to:Maintain/troubleshoot Windows servers, workstations and peripheralsPerform Windows system administrative support to include account management, installing software and monitoring systemsMaintain domain controllers, file and application serversProperly receive and triage customer incidents in the ticketing systemFollow standard operating procedures to accurately log all tickets within the ticketing systemPerform remote troubleshooting through diagnostic techniquesProperly escalate unresolved tickets to the next tier of supportEngage with customers throughout the process and follow up to ensure proper incident closureEnsure quality and productivity standards are maintained while meeting customer timelinesWork schedule is 2nd shift with occasional weekends as neededMinimum Qualifications:Bachelor's Degree in Information Technology, Cybersecurity, Data Science, Information Systems, or Computer Science, from an ABET accredited or CAE designated institution with 4+ years experience or 8+ years of experience as a System Administrator or in a similar role.DoD 8570 IAT Level II certification, ex., Security+Experience with network troubleshootingKnowledge of system security, data backup/recovery, and network monitoringPreferred Qualifications:DoD 8140-451 Intermediate Certification (Cloud+ or GICSP or SSCP or GSEC)ITIL 4 Foundations certificationAzure CertificationSecurity Clearance Requirements:Must have a current/active Top Secret-SCI clearance adjudicated within the last 6 years 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.

Created: 2026-03-16