Windows System Administrator - CESO @ TEKsystems

Windows Systems Administrator (Windows Server)

Location: Arlington, VA (100% On-Site)Schedule: Monday-Friday, First ShiftClearance: Active TS/SCI Required (CI Poly Preferred)

Overview

Our client is seeking a Windows Systems Administrator to support a secure enterprise IT environment. The ideal candidate will have experience administering Windows Server infrastructure, Active Directory, VMware environments, and enterprise security best practices. This role supports daily operations, system maintenance, troubleshooting, and continuous improvement initiatives across a multi-user enterprise environment.

Responsibilities

• Create, maintain, and update system documentation and standard operating procedures.
• Administer and support Windows Server environments.
• Manage Active Directory, Group Policy Objects (GPOs), and local security policies.
• Configure, maintain, and troubleshoot VMware virtual environments.
• Install, configure, and maintain server hardware and software.
• Apply system hardening and security best practices, including DISA STIG compliance.
• Perform vulnerability remediation and security compliance activities using tools such as SCAP.
• Develop and maintain PowerShell scripts to automate administrative tasks.
• Support Remote Desktop Services (RDS) environments.
• Manage scheduled tasks and routine maintenance activities.
• Monitor system performance and resolve operational issues.
• Collaborate with infrastructure and network teams to ensure system availability and reliability.
• Review and validate work completed by junior team members as needed.

Required Qualifications

• Experience administering Windows Server environments.
• Experience managing Active Directory and Group Policy.
• Experience supporting VMware virtualization platforms.
• Experience with PowerShell scripting.
• Experience applying security configurations and system hardening standards.
• Knowledge of DISA STIG requirements and security compliance practices.
• Experience with SCAP or similar compliance tools.
• Experience with Remote Desktop Services.
• Experience installing, configuring, and troubleshooting enterprise hardware and software.
• Strong troubleshooting and problem-solving skills.
• Active TS/SCI security clearance.

Preferred Qualifications

• AWS cloud experience.
• CI Polygraph.
• Experience with Linux administration.
• Experience with enterprise storage technologies (SAN/NAS).
• Understanding of TCP/IP networking principles.
• Experience with ticketing platforms such as Remedy or ServiceNow.
• ITIL Foundation certification.
• Experience supporting virtualized enterprise environments.

Top Skills

• Windows Server
• Active Directory
• Group Policy (GPO)
• VMware
• PowerShell
• AWS

Experience Level

Mid-Level

Job Type & LocationThis is a Contract position based out of Arlington, VA.

Pay and BenefitsThe pay range for this position is $50.00 - $65.00/hr. Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors. Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:

Medical, dental & vision

Critical Illness, Accident, and Hospital

401(k) Retirement Plan Pre-tax and Roth post-tax contributions available

Life Insurance (Voluntary Life & AD&D for the employee and dependents)

Short and long-term disability

Health Spending Account (HSA)

Transportation benefits

Employee Assistance Program

Time Off/Leave (PTO, Vacation or Sick Leave)

Application DeadlineThis position is anticipated to close on Nov 13, 2026.

Workplace TypeThis is a fully onsite position in Arlington,VA.

About TEKsystems

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

Were a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. Were a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. Were strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. Were building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.