Design Engineer III

AT&T

Confirmed live today High trust

Quick summary

Work type: On-site
Location: Chantilly, VA
Salary: $98,100–$203,000 / yr
Posted: 55 days ago
Freshness: Confirmed live today
Closes: Nov 30, 2026
Nearby: 99+ roles within 25 mi

Market check

Salary context

Competitive pay

How this pay compares to similar roles

Similar $168k

This role $151k

$86k $216k

below market most similar roles pay here above market

This role pays less than 58% of similar roles. Most pay $134,900–$200,325 — the blue band above. At the midpoint, this role pays about $151k versus about $168k 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 91 open roles on FindRole.

Listed pay typically runs $98,100–$196,000 across 81 roles with salary data.

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At a glance

TL;DR · Design Engineer III

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Design Engineer (ND III) (Government) joins the National Security Team to support global enterprise networks for the intelligence community. This role involves designing, engineering, and transitioning critical operations to a modern service provider network architecture, specifically focusing on Campus Area Network and Local Area Network environments. Key responsibilities include interpreting customer requirements, documenting designs with diagrams and bill of materials, and evaluating new technologies in a private test lab. The engineer will schedule maintenance windows for migrating legacy connections, provide technical expertise for fault isolation, and develop secure designs aligned with DISA STIGs. Required technical skills include experience with Cisco, Brocade, and Juniper hardware, as well as routing protocols like OSPF and BGP, and switching protocols including VLANs and 802.1q.

Skills

CAN LAN MPLS BGP OSPF VLAN 802.1q Cisco Juniper Brocade Firewalls STIGs Network Design Network Engineering Routing Switching

What you'll do

Interpret customer requirements to create fully documented network designs including diagrams and bill of materials.
Evaluate new technologies and test proposed production network changes using a private test lab.
Schedule maintenance windows to migrate user connections from legacy to modern infrastructure with minimal data impact.
Provide technical expertise to operations engineers for fault isolation and innovative problem resolution.
Develop secure network configurations aligned with DISA STIGs and obtain Authority to Operate (ATO) for new capabilities.
Supervise network support specialists to plan, coordinate, and implement various network services.
Develop and improve design products, processes, and systems to increase team efficiency.

What we're looking for

Must possess a TS/SCI security clearance with a polygraph.
Must have 16 years of experience based on a combination of work history and education.
Must be compliant with DoD 8140 Information Assurance Technical (IAT) Level 2.
Must have experience in Tier III or higher network operations, network design, and implementation.
Must have prior responsibility for production network hardware configurations for Cisco, Brocade, and/or Juniper.
Must have hands-on experience implementing and troubleshooting standard routing protocols like OSPF or BGP in production networks.
Must have hands-on experience implementing and troubleshooting standard switching and trunking protocols like VLANs, 802.1q, and port-channels.
Network engineering and design experience specific to CAN/LAN, MPLS WANs, and firewalls (preferred).

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