Windows System Administrator

Windows Systems Administrator *Location:* Arlington, VA *Schedule:* 100% On-Site | Monday-Friday | 12:00 PM - 8:00 PM (2nd Shift) *Clearance Required:* Active TS/SCI Overview We are seeking a *Windows Systems Administrator* to support a highly secure enterprise environment responsible for delivering critical infrastructure, system administration, and cloud-based services. This role is ideal for a systems administrator with strong Windows Server experience who enjoys working in a mission-focused environment and supporting enterprise-level operations. The selected candidate will be responsible for maintaining Windows server environments, managing Active Directory, implementing security best practices, supporting virtualization technologies, and ensuring the reliability and performance of enterprise systems. Key Responsibilities * Create, maintain, and implement detailed system administration documentation and standard operating procedures. * Develop, implement, and monitor policies and standards related to enterprise computing resources. * Evaluate hardware and software solutions and provide recommendations for implementation. * Support and maintain Windows server environments and enterprise infrastructure. * Review technical work performed by junior team members and provide guidance as needed. * Work independently and collaboratively with network administrators and other technical teams to ensure system availability and performance. * Manage Active Directory environments, Group Policy Objects (GPOs), and Local Security Policies. * Install, configure, maintain, and troubleshoot hardware and software systems. * Apply security hardening standards, including DISA STIG compliance and related best practices. * Support scheduled tasks, system automation, and scripting efforts. * Maintain a secure and stable virtualized environment. Required Qualifications * Bachelor's degree and 4+ years of related experience supporting Windows server environments. Additional experience, training, or education may be considered in lieu of a degree. * Active *TS/SCI security clearance*. * Current *DoD 8570 IAT Level II certification* (Security+ CE or equivalent). * Experience administering and troubleshooting Windows Server environments. * Strong knowledge of *Active Directory*, *Group Policy Management*, and Windows security controls. * Experience supporting and maintaining *VMware* environments. * Experience with *Remote Desktop Services*. * Experience with *PowerShell scripting*; Python experience is a plus. * Experience applying security controls and compliance frameworks, including *DISA STIGs*. * Experience with *Security Content Automation Protocol (SCAP)*. * Experience using *Windows Task Scheduler*. * Experience installing, configuring, and maintaining enterprise hardware and software. * Understanding of cloud technologies, particularly *AWS*, is highly desirable. * Ability to obtain a CI Polygraph if required in the future. Preferred Qualifications * TS/SCI with CI Polygraph. * Experience integrating network management and element management systems with performance monitoring, ticketing, and security platforms. * Experience supporting Storage Area Networks (SAN), Network Attached Storage (NAS), and enterprise switching environments. * Knowledge of networking principles, including TCP/IP. * Experience with ticketing platforms such as BMC Remedy. * ITIL Foundation certification. * Experience supporting Linux and Solaris operating systems. * Strong background working within virtualized enterprise environments. Why Apply? * Opportunity to support a highly secure enterprise infrastructure. * Exposure to modern cloud and virtualization technologies. * Collaborative team environment with experienced technical leadership and mentorship. * Strong opportunity for professional growth while supporting critical enterprise operations. *Top Skills:* * Windows Server Administration * Active Directory * Group Policy (GPO) * VMware * AWS * PowerShell * Security Compliance (DISA STIGs) * Remote Desktop Services Shift Information This position is *100% on-site in Arlington, VA* and currently operates on a *Monday-Friday, 12:00 PM to 8:00 PM schedule*. Future operational requirements may adjust the schedule to *2:00 PM to 10:00 PM*. *Job Type & Location*This is a Contract position based out of Arlington, VA. *Pay and Benefits*The 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) *Workplace Type*This is a fully onsite position in Arlington,VA. *Application Deadline*This position is anticipated to close on Sep 3, 2026. 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 We're 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. We're 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. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're 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.