Senior Systems Administrator Engineer

AT&T

Quick summary

Work type: On-site
Location: Chantilly, VA
Salary: $98,100–$220,000 / yr
Posted: 4 days ago
Nearby: 99+ roles within 25 mi

Market check

Salary context

Competitive pay

How this pay compares to similar roles

Similar $163k

This role $159k

$83k most similar roles pay here $235k

This role pays less than 55% of similar roles. Most pay $131,000–$195,050 — the shaded band above. At the midpoint, this role pays about $159k versus about $163k 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 61 open roles on FindRole.

Listed pay typically runs $140,000–$215,800 across 55 roles with salary data.

Most-posted roles

View all roles at AT&T

At a glance

TL;DR · Senior Systems Administrator Engineer

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As a Senior Security Engineer at AT&T supporting U.S. Government contracts, you will play a critical role in maintaining secure communications and systems by managing networking, physical and virtual computing infrastructure, threat detection tools, system monitoring, and incident response. Your day-to-day responsibilities include administering Linux-based operating systems, supporting Windows environments, mentoring junior team members, configuring security tools like Trellix and Splunk, performing vulnerability remediation, and producing technical documentation. You will work closely with ISSOs and ISSMs to ensure compliance and operational readiness. Required qualifications include a Bachelor's degree, 5 years of relevant experience in security operations, active Top Secret/SCI clearance with polygraph, and strong communication skills. Desired qualifications enhance your expertise in virtual computing, ITSM, and various security certifications. This role demands hands-on technical proficiency and leadership within a high-stakes environment focused on robust IT service and support for government entities.

Skills

Linux Red_Hat CentOS Ubuntu VMware KVM Hyper-V Windows_Server Trellix SentinelOne Nessus Splunk CI/CD ITSM ServiceNow RHCE MSSC IAT/IAM DoDD_8570 DoDD_8140

What you'll do

Administer and maintain Linux-based operating systems and virtualization platforms.
Support Windows server and workstation environments in enterprise-wide deployments.
Install, configure, operate, and maintain security tools like Trellix and Splunk.
Perform system patching, vulnerability remediation, and hardening activities regularly.
Deliver technical support from Tier 1 to Tier 3 levels for various issues.

What we're looking for

Bachelor's degree and at least 5 years of experience in security operations for virtualization and computing solutions.
Active Top Secret/SCI clearance with polygraph required.
Experience with on-premise, cloud, and hybrid-cloud deployments.
Strong written and verbal communication skills; demonstrated leadership and team-oriented interpersonal skills.
Extensive hands-on experience administering Linux-based operating systems and virtualization platforms.
Proficient in installing, configuring, and maintaining security tools such as Trellix, SentinelOne, Nessus, Splunk.
Experience mentoring junior staff on installation procedures, operational best practices, and security-focused administration.

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