**Description** SAIC is seeking a motivated and experienced **System Administrator** to join our team at the Pentagon in Arlington, VA. **This position is 100% onsite.** Shift Schedule: Monday-Friday, 6:00 AM to 6:00 PM core hours with occasional after-hours onsite work to support a NIPR and SIPR environment. **Position Overview:** + Manage currently supported and subsequent Windows Server Operating Systems on virtual operating environments, providing technical oversight and consultation services. + Perform complex system administration and security engineering efforts, STIG remediation, advanced GPO implementation and system upgrades. + Research and resolve performance, capacity, and other server-related issues. + Provide mentorship and guidance to junior systems administrators and other IT staff. + Improve efficiencies by documenting and standardizing support processes while capturing and developing best practices. + Provide support for the escalation and communication of statuses to leadership to include the government customer. + Maintain and update Server STIG (Security Technical Implementation Guide) requirements to comply with DISA standards. + Ability to remain flexible and adapt to changing priorities with efficiency. + Adhere to change management guidelines by writing Change Requests and seeking the necessary approvals. + Support operational transition of enterprise solutions into production. **Qualifications** **Required Education and Experience:** + Bachelors degree and five (5) years or more of experience or Masters and three (3) or more years of related experience. **Required Clearance and Certificates:** + Active DOD Top Secret clearance; ability to obtain a TS/SCI. + US citizenship. + Active DoD 8570.01-M/8140 IAT Level II certification (e.g., Security+ CE, CySA+, etc.) + Relevant Computing Environment Certificate. **Required Technical Skills:** + Expert-level knowledge of Microsoft Windows Server, Active Directory Domain Services (AD DS), Domain Name System (DNS), and Group Policy (GP) management. + Experience implementing and managing Active Directory Certificate Services (AD CS) to support a large-scale Public Key Infrastructure (PKI). + Strong understanding of authentication mechanisms (Kerberos, LDAP, NTLM) and experience with advanced troubleshooting. + Experience implementing Public Key Infrastructure (PKI) with Active Directory. + Knowledge of Security Assertion Markup Language (SAML). + Excellent analytical skills and a proven track record in developing and implementing innovative solutions to complex problems. + Experience working in a multi-tenant or large enterprise server environment. + Skilled in scripting and automation using PowerShell to improve and standardize system management. **Desired Qualifications:** + Active DoD 8140 IAT Level III certification. REQNUMBER: 2512324 SAIC is a premier technology integrator, solving our nation's most complex modernization and systems engineering challenges across the defense, space, federal civilian, and intelligence markets. Our robust portfolio of offerings includes high-end solutions in systems engineering and integration; enterprise IT, including cloud services; cyber; software; advanced analytics and simulation; and training. We are a team of 23,000 strong driven by mission, united purpose, and inspired by opportunity. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $6.5 billion. For more information, visit saic.com. For information on the benefits SAIC offers, see Working at SAIC. EOE AA M/F/Vet/Disability