Senior Systems Administrator Engineer

AT&T

Confirmed live today High trust

Quick summary

Work type
On-site
Location
Chantilly, VA
Salary
$98,100–$220,000 / yr
Posted
106 days ago
Freshness
Confirmed live today
Closes
Dec 31, 2026

Market check

Salary context

Competitive pay

How this pay compares to similar roles

Similar $162k
This role $159k
$83k most similar roles pay here $235k

This role pays more than 55% of similar roles. Most pay $132,000–$192,000 — the shaded band above. At the midpoint, this role pays about $159k versus about $162k for comparable roles.

Based on 240 similar postings.

Employer

About AT&T

AT&T is a US-based telecommunications company providing wireless, broadband, and fiber internet service along with phone and connectivity products for consumers and businesses.

AT&T currently has 79 open roles on FindRole.

Listed pay typically runs $98,100–$203,000 across 74 roles with salary data.

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View all roles at AT&T

At a glance

TL;DR · Senior Systems Administrator Engineer

The Senior Systems Administrator Engineer (Government) joins the IT Service and Support framework to manage secure, IP-enabled network solutions and infrastructure for federal government contracts. This hands-on role involves managing systems administration, security operations, compliance activities, and user administration while mentoring junior team members on installation procedures and best practices. The daily work includes configuring, deploying, and maintaining Linux-based operating systems like Red Hat, CentOS, and Ubuntu, alongside Windows server environments and virtualization platforms such as VMware, KVM, and Hyper-V. You will utilize tools including Trellix, SentinelOne, Nessus, and Splunk to perform system patching, vulnerability remediation, and hardening. The role addresses the technical challenge of ensuring operational readiness and security compliance for government systems through multi-platform support, infrastructure integration, and the implementation of new technologies within a secure, high-security environment requiring specialized clearance.

What you'll do

  • Administer and maintain Linux-based operating systems and virtualization platforms including Red Hat, VMware, and Hyper-V.
  • Support Windows server and workstation environments across standalone and enterprise-wide deployments.
  • Install, configure, and maintain security and analysis tools such as Trellix, SentinelOne, Nessus, and Splunk.
  • Perform system patching, vulnerability remediation, and hardening activities for systems and networks.
  • Provide Tier 1 through Tier 3 technical support for hardware, software, and network infrastructure.
  • Produce and maintain operational documentation including policies, instructions, and system build documents.
  • Support security compliance efforts and system accreditation processes in coordination with ISSOs and ISSMs.
  • Mentor junior and mid-level team members on installation procedures and security-focused administration.

What we're looking for

  • U.S. citizenship is required.
  • Top Secret/SCI clearance with polygraph is required.
  • Bachelor's degree and minimum 5 years of experience in security operations for virtualization, Windows, and Linux computing solutions are required.
  • Experience with on-premise, cloud, and hybrid-cloud based deployments is required.
  • Strong written and verbal communication skills are required.
  • Demonstrated leadership and team-oriented interpersonal skills are required.
  • CISSP, virtual computing certifications (DoD 8570/8140), or comparable VMware, RHCE, MS, or IAT/IAM certifications are preferred.
  • Security clearance.

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