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Senior Systems Administrator-TS with Security Clearance

TEKsystems c/o Allegis GroupDallas, TX🇺🇸United StatesPosted Oct 12, 2026

Quick Overview

Seniority
Mid Senior
Employment type
Any Job Type
Work mode
Hybrid
Location
Dallas, TX, United States
Posted
Yesterday
VMwareActive Directory

Job Description

Overview
We are seeking an experienced Senior Systems Administrator to support enterprise IT infrastructure within a highly secure and mission-critical environment. This role is ideal for a seasoned professional with strong Windows and Linux administration experience, a cybersecurity-focused mindset, and the ability to provide both hands-on technical support and technical leadership.
Responsibilities

  • Administer and support enterprise Windows and Linux server environments.
  • Manage MECM, VMware, Active Directory, and Windows Server environments.
  • Perform advanced troubleshooting and resolve complex infrastructure issues.
  • Support RMF and DFARS compliance requirements.
  • Provide technical leadership and mentorship to junior team members.
  • Collaborate with cross-functional teams to improve system stability, performance, and security.
Required Qualifications
  • Expert-level Windows and Linux systems administration experience.
  • Experience with MECM/SCCM, VMware, Active Directory, and Windows Server.
  • Strong enterprise infrastructure and endpoint management experience.
  • Security+ or equivalent IAT Level II certification required.
  • Experience in government, defense, or regulated environments.
  • Active Top Secret Clearance required.
Preferred Experience
  • CISSP or advanced security certifications.
  • RMF and DFARS compliance experience.
  • Enterprise virtualization and infrastructure management.
  • Technical leadership and mentoring experience.

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