Systems Administrator I

Mission Technologies, a division of HII

. Operate, maintain, and support enterprise Microsoft Windows Server environments .

Posted 10/28/2026full-timeSpringfield • Virginia • United StatesMid-LevelSenior💰 $95,000 - $155,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in operating and maintaining Microsoft Windows Server environments, with a strong focus on security configurations, system administration, and vulnerability remediation. Proficient in using monitoring tools and managing Active Directory, Exchange, and SCCM/MECM within secure processing environments.

Highest-signal resume keywords

Microsoft Windows Server AdministrationActive Directory ManagementSCCM/MECM Vulnerability RemediationSecurity Configuration ManagementCommand Line Administration (PowerShell)

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

System InstallationSystem ConfigurationPatch ManagementFile Services ManagementSQL Server AdministrationDHCP ManagementDNS ManagementGroup Policy ManagementRemote MonitoringCitrix Administration

Tools & Technologies

SCCMMECMPowerShellCitrix Virtual ApplicationsSolarWindsServiceNowSplunk

Certifications & Qualifications

Active TS/SCI Security ClearanceDoD 8140/CSWF Certification

Industry Keywords

Secure Processing EnvironmentVulnerability RemediationChange ManagementSystem DocumentationEnterprise Monitoring Tools

Tech Stack

Tools & technologies

CitrixDNSServiceNowSplunkSQLTypeScript

About the role

Key responsibilities & impact

Operate, maintain, and support enterprise Microsoft Windows Server environments
Support and troubleshoot Active Directory, Exchange, File Services, SharePoint, and SQL Server
Perform system installations, configurations, patching, and routine maintenance
Integrate systems with enterprise monitoring, security, and configuration-management tools
Apply and maintain security configurations based on SRGs and STIGs
Support vulnerability remediation using SCCM/MECM
Operate systems within secure processing environments meeting accreditation and audit requirements
Use remote monitoring and management tools to identify, assess, and resolve issues across a globally dispersed enterprise
Document system configurations
Support change-management processes
Assist with solution deployment activities
Coordinate with senior administrators to keep environments secure, compliant, and aligned with mission needs

Requirements

What you’ll need

3+ years of hands-on systems experience providing O&M support of enterprise Microsoft Windows server operating systems and server applications
Experience with Active Directory, Exchange, File Services, SCCM/MECM, and Citrix
Experience managing and configuring DHCP, DNS, and Group Policies
Experience performing system administration via command line interfaces such as PowerShell
Experience using remote monitoring and management tools
Experience conducting vulnerability and flaw remediation via SCCM or MECM
Experience operating and maintaining solutions in a secure processing environment
Experience applying and maintaining security configurations based on SRGs and STIGs
Active TS/SCI government security clearance required to start, with ability to obtain CI Poly
Must meet DoD 8140/CSWF for 451-Intermediate or be willing to obtain the appropriate credential within 6 months
High school diploma or equivalent required for Systems Administrator 1; higher levels provide alternative combinations of relevant experience with bachelor's or master's degrees
Preferred: prior experience with Citrix Virtual Applications and Desktop (CVAD)
Preferred: familiarity with basic network troubleshooting concepts and approaches
Preferred: formal training or vendor certifications on Microsoft Server, Citrix, Cisco, Splunk, SolarWinds, or ServiceNow

Benefits

Comp & perks

Required travel limited to 0–10%
Opportunity to obtain CI Poly
Opportunity to obtain the appropriate DoD 8140/CSWF 451-Intermediate credential within 6 months
Reasonable accommodations during the employment process