Senior Systems Administrator - TS/SCI with Polygraph

gdit; Reston (VA); On-site; USD 166,000 - 224,000; Full time

Job summary

GDIT seeks a Systems Administrator SME to advance enterprise IT operations. You will design and implement infrastructure upgrades, manage VMware environments, and provide Windows and Linux administration with STIG-compliant image creation.

You will deploy software packages, mentor junior staff, automate tasks with PowerShell or Bash, and handle AD/GPO/DNS/DHCP. Top Secret SCI + Polygraph eligible; 8570 IAT Level 2 preferred; US citizenship required.

Qualifications

• 10+ years of related experience in IT infrastructure and systems administration.
• Bachelor's degree in a relevant field and US citizenship.
• Security+ certification with 8570 compliance; TS/SCI with CI Poly preferred.

Responsibilities

• 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 and Linux OS.
• Deploys software via SCCM, PDQ, and similar tools.
• Mentors Mid and Junior Systems Administrators.
• Automates tasks with scripting (PowerShell and/or Bash).
• Performs hardware maintenance/repair and supports major projects.

Skills

Critical Systems

IT Systems

IT Troubleshooting

Education

Bachelor of Arts/Bachelor of Science in a field applicable to this work

Tools

VMware

Nutanix

Job description

Type of Requisition:

Regular

Clearance Level Must Currently Possess:

Top Secret SCI + Polygraph

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: Critical Systems, Information Technology (IT) Systems, IT Troubleshooting

Certifications: None

Experience: 10 + years of related experience

US Citizenship Required: Yes

Job Description:

SYSTEMS ADMINISTRATOR SME

Advance how our customers operate while you advance your career. Join GDIT as a Systems Administrator SME and build an impactful career in enterprise IT, collaborating with people who are driven and resourceful like you.

MEANINGFUL WORK AND PERSONAL IMPACT

• 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.

WHAT YOU’LL NEED TO SUCCEED

Bring your technology expertise and drive for innovation to GDIT. The Systems Administrator SME must have:

• 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.

GDIT IS YOUR PLACE

At GDIT, the mission is our purpose, and our people are at the center of everything we do.

• Growth: AI-powered career tool that identifies career steps and learning opportunities
• Support: An internal mobility team focused on helping you achieve your career goals
• Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off
• Community: Award-winning culture of innovation and a military-friendly workplace

OWN YOUR OPPORTUNITY

Explore an enterprise IT career at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your desire to drive operations forward.

#VA_2026Alumni

#GDITEnhanced2026

#GDITCareers

#JET

The likely salary range for this position is $165,750 - $224,250. 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

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 technology solutions 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 mission-ready capabilities in AI, cloud, cyber and software development. 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