Senior Information Systems Security Engineer

AT&T

Confirmed live yesterday High trust

Quick summary

Work type
On-site
Location
Reston, VA
Salary
$118,700–$206,000 / yr
Posted
22 days ago
Freshness
Confirmed live yesterday
Closes
Nov 19, 2026

Market check

Salary context

Competitive pay

How this pay compares to similar roles

Similar $171k
This role $162k
$108k most similar roles pay here $216k

This role pays less than 54% of similar roles. Most pay $145,700–$195,500 — the shaded band above. At the midpoint, this role pays about $162k versus about $171k 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 $117,350–$226,800 across 56 roles with salary data.

Most-posted roles

View all roles at AT&T

At a glance

TL;DR · Senior Information Systems Security Engineer

The Senior Information Systems Security Engineer (Government) joins the TAC2O systems program to provide managed IT support for high-priority defense intelligence collection needs. This role involves designing, developing, and recommending integrated security system and physical control solutions to protect proprietary and confidential data. The engineer will manage information-related risks, conduct technical engineering services, and navigate the RMF process to obtain and maintain authorizations like IATT, ATC, and ATO for classified systems. Daily responsibilities include configuring secure systems, analyzing scan results, developing system test plans, and participating in incident response activities. Required skills include advanced Windows administration with PowerShell scripting, Linux proficiency, and experience with ACAS, Trellix, Splunk, and STIGs. The role addresses the critical challenge of ensuring network systems meet DIA C&A and IA requirements within complex, tiered security environments including Special Access Programs.

What you'll do

  • Provide technical expertise to ensure network systems meet DIA C&A and IA requirements for certification.
  • Design and recommend integrated security system and physical control solutions to protect confidential data.
  • Manage the RMF process to obtain and maintain IATT, ATC, and ATO for classified systems.
  • Configure and validate secure systems while testing products to detect potential security weaknesses.
  • Develop comprehensive system test plans to assess the overall security posture of information systems.
  • Analyze scan results and security findings to prioritize remediation efforts and implement corrective measures.
  • Participate in incident response activities and assist in resolving security incidents as needed.

What we're looking for

  • TS/SCI clearance with Polygraph required.
  • Bachelor's degree in a relevant field and four years of experience, or relevant experience.
  • Must be 8570 compliant (IAT Level 2 preferred).
  • Advanced Windows administration capabilities and Linux proficiency.
  • Experience deploying, maintaining, and troubleshooting security tools including ACAS, Trellix, Splunk, and STIGs.
  • Experience with RMF processes for obtaining and maintaining IATT, ATC, and ATO.
  • Familiarity with tiered security environments (U, S, TS) (preferred).
  • Advanced PowerShell scripting and experience with cloud service provider accreditation (preferred).

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