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MANTECH
Mantech
Senior Systems Administrator at ManTech, Chantilly VA. Enterprise O&M, ServiceNow monitoring, patch management, IdAM support, RMF compliance. IAT Level II required. Medical, 401k, PTO.
Consulting
Mid-Level
ServiceNow Role Type:
ServiceNow Modules:
DevOps
IT Service Management
Incident Management
Security Operations
ServiceNow Certifications (nice to have):
Job description
Posted on:
December 13, 2025
MANTECH seeks a motivated and skilled Senior Systems Administrator to join our sustainment team in Chantilly, VA.
Requirements
- Provide hands-on O&M support for enterprise systems, including break-fix resolution and routine sustainment tasks
- Monitor system performance, health, and availability using enterprise tools such as ServiceNow and JIRA
- Collaborate with engineering and Assessment & Authorization (A&A) teams to apply patches, perform upgrades, and ensure RMF compliance
- Support Identity and Access Management (IdAM) initiatives, including PKI, LDAP, and related authentication technologies
- Maintain system documentation, configuration management, and security baselines in tools such as GitLab and Confluence
- Conduct vulnerability scans, apply security patches, and ensure adherence to established cybersecurity standards
- Contribute to DevOps and Agile processes by supporting deployments and collaborating closely with QA and development teams
- Provide clear and timely communication on system status, planned maintenance, and incident response activities to stakeholders
Benefits
- Medical, dental and vision insurance
- 401(k) matching
- Paid time off
- Flexible spending accounts
- Employee assistance program
Requirements Summary
Bachelor's degree or 4+ years of experience in IT, O&M, sustainment, and/or break-fix support, 5+ years of experience in IT, O&M, sustainment, and/or break-fix support, IAT Level II certification (GSEC, Security+, SSCP, or CCNA-Security)
