Senior System Administrator - TS/SCI w/Polygraph

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret/SCI Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: IT Infrastructure and Operations Job Qualifications: Skills: Backup and Recovery, Computer Servers, Information Technology (IT) Systems, Linux, Wide Area Network (WAN) Certifications: CompTIA Security+ CE | CompTIA - CompTIA Experience: 9 + years of related experience US Citizenship Required: Yes Job Description: Senior Systems Administrator Transform technology into opportunity as a Senior Systems Administrator with GDIT. A career in enterprise IT means connecting and enhancing the systems that matter most. At GDIT you’ll be at the forefront of innovation and play a meaningful part in improving how agencies operate. The job duties of the Sr. Systems Administrator are as follows: Plans, designs, and implements infrastructure changes and system upgrades. Manages and troubleshoots multiple VMware environments. Provides Windows Server and Linux administration, maintenance, and troubleshooting. Creates STIG compliant images for Windows Desktop, Windows Server, and Linux OS. Creates, tests, and deploys software packages using software deployment products such as SCCM, PDQ, etc. Provides expert level support and mentoring for Mid and Junior Systems Administrator personnel. Develops and maintains installation and configuration procedures for system and software changes. Utilizes scripting to automate common tasks. Performs hardware maintenance/repair activities. Ensures proper planning and execution of major projects/maintenance activities. Provides advanced level administration and troubleshooting of Active Directory, GPO, DNS, DHCP, and Domain Controllers. Required Qualifications: Ability to write scripts using PowerShell and/or Bash. Experience managing VMware, Nutanix, and other types of enterprise level Virtual Infrastructures. Proficient in managing and troubleshooting Active Directory and Group Policy Object (GPO). At least 10 years of relevant experience. Security + Certified; Must presently be 8570 compliant (IAT Level 2 preferred) Bachelor of Arts/Bachelor of Science in a field applicable to this work US Citizenship Required TS/SCI with CI Poly Desired Qualifications Linux OS (CentOS, RHEL) administration. Satellite server administration. Ansible playbook writing. Implementing STIGs. Experience supporting a software configuration management and development environment GDIT IS YOUR PLACE: 401K with company match Comprehensive health and wellness packages Internal mobility team dedicated to helping you own your career Professional growth opportunities including paid education and certifications Cutting-edge technology you can learn from Rest and recharge with paid vacation and holidays #GDITCareers #WeAreGDIT #MD_Alumni2026 #VA_2026Alumni #JET The likely salary range for this position is $142,792 - $184,000. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range. Scheduled Weekly Hours: 40 Travel Required: None Telecommuting Options: Onsite Work Location: USA VA Reston Additional Work Locations: Total Rewards at GDIT: Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most. Our Identity Verification Process: As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes. About Our Work: We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology. Join our Talent Community to stay up to date on our career opportunities and events at gdit.com/tc. Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans Join our 26,000 everyday heroes. We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 30 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology. For more information about GDIT's Privacy Policy, click here: Privacy Policy | GDIT