Systems Administrator - TS/SCI With CI Polygraph Required

****This position requires an active DoD Clearance (Top Secret/SCI with a CI Polygraph)****

***Because an active DoD clearance is required, U.S. Citizenship is required***
Description
TEKsystems is looking for a Systems Administrator for a large government integrator near Denver, CO. Job responsibilities will include, but not be limited to, the following:
Perform as a Linux System Administrator on large government contracts.
Perform administration on VMware technologies (or related)
Maintain smooth operation of multi-user computer systems, including coordination with network, software, and system engineers, PC desktop technicians, project managers, end users, and customer and IT management.
Recommend and implement system enhancements that will improve the performance and reliability of the system including installing, upgrading/patching, monitoring, problem resolution, and configuration management.
Provide backup and recovery services; manage file systems and disk space; manage virus protection on a routine basis.
Create and maintain user and computer accounts and modify file permissions and security access lists.
Test new releases of products to ensure compatibility and minimize user impact.
Develop and document technical processes and procedures as needed.
Interact, meet, discuss, and troubleshoot issues with vendors; evaluate vendor products, services, and suggestions.
Adhere to strict Information Systems security guidelines in all cases.
Maintain security audit and logging information on all classified networked and standalone computers as directed by the Information Systems Security Manager (ISSM).
Prepare security documentation for Cyber Security team.
Skills
linux, stig, SSO, VMware, esxi, Active directory, System administrator, Windows, Server administrator
Top Skills Details
1. 5+ years of experience with Red Hat Enterprise Linux (RHEL) server administration in an SCI classified environment
2. VMware and ESXi (6.x or higher) configuration and management experience
3. Group Policies (GPOs) experience; Active Directory management experience
TS with SCI and full scope Poly
Must have a DOD 8570 IAT Level 2 baseline certification (example: Security+ CE, CISSP)
Ability to support after hours and on weekends as needed.
Additional Skills & Qualifications
Preferred Qualifications:
Higher degree in a STEM-related discipline
Security+ CE
5+ years of experience with Red Hat Enterprise Linux (RHEL) server administration in an SCI classified environment
Experience operating under and managing systems within NISPOM Chapter 8, DCID 6/3-ICD 503, RMF, STIG, JAFAN, or JSIG information system environments
Experience with NAS storage device (preferably NetApp) administration (ONTAP 8.x or higher; CDOT)
Solid understanding of Enterprise-level storage concepts to include all commonly used RAID-levels
Solid understanding of remediating security vulnerabilities; Experience hardening Linux systems in accordance with RMF and STIGs
Identity Management (Single Sign-On) experience
VMware and ESXi (6.x or higher) configuration and management experience
Experience with host-based firewall implementations and configuration (Redhat "iptables")
Windows 10 administration experience; Windows Server experience; Group Policies (GPOs) experience; Active Directory management experience
Solid writing skills and use of Wiki pages and Sharepoint sites for documentation
DoD 8570 Certification in a primary OS (Windows, Linux, Cisco)
Experience in VMWare, NetApp and Splunk among other industry standard technologies. Comfortable with maintenance and OS upgrades
Preferred candidate will be familiar with Tenable and Nessus scans for vulnerability and controls implementation.
Experience Level
Intermediate Level
Job Type & Location
This is a Contract position based out of Aurora, CO.
Pay and Benefits
The pay range for this position is $50.00 - $70.00/hr.
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 Aurora,CO.
Application Deadline
This position is anticipated to close on Mar 11, 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.