Network Design Engineer

Leidos; South Dakota; On-site; USD 73,000 - 133,000; Full time

Job summary

Leidos’ Digital Modernization Sector seeks a Design Engineer (CAN/LAN) to support global enterprise networks. You will design, document, and transition network solutions, leveraging a private test lab to validate changes and ensure smooth migrations with minimal data disruption.

The role requires a TS/SCI with Poly clearance, 10 years of experience, and hands-on experience with OSPF/BGP, VLANs, 802.1q, and port-channels. Opportunities to work on MPLS WANs are included.

Qualifications

• Security clearance: TS/SCI with Poly.
• 10 years of experience combining work history and education (e.g., Doctorate + 3 years, etc.).
• DoD 8140 IAT Level 2 compliance.
• Experience in network engineering including Tier III+ operations and design.
• Production network hardware configurations for Cisco, Brocade, and/or Juniper.
• Hands-on experience with OSPF or BGP in production networks.
• Hands-on experience with VLANs, 802.1q, and port-channels.
• CAN/LAN network engineering with industry standards and production integration.
• MPLS WANs, network management tools, and firewalls.
• Extensive BGP experience is a plus; CCNP or equivalent knowledge.
• Initiative and ability to work unsupervised within a network engineering team.

Responsibilities

• Interpret requirements and document CAN/LAN designs with diagrams, BOMs, cabling sheets, and configurations.
• Use private test lab to evaluate new technologies and test changes in production networks.
• Schedule maintenance windows for migration with minimal data-impact.
• Provide expertise to Operations for fault isolation and resolution.
• Develop secure network designs aligning with DISA STIGs and obtain ATO for new devices.
• Supervise (not manage) other network support specialists.
• Develop and improve design products, processes, and systems for efficiency.
• Learn and work on MPLS WANs in addition to CAN/LAN as needed.

Skills

CAN/LAN design

MPLS WANs

Routing protocols

Switching protocols

BGP

CCNP knowledge

STIGs compliance

ATO process

Unsupervised work

Tools

Cisco

Brocade

Juniper

Firewalls

Network management tools

Job description

The Digital Modernization Sector at Leidos has an opening for a Design Engineer (Campus Area Network/Local Area Network (CAN/LAN))to support our customer’s global enterprise networks. The CAN/LAN service network architecture provides solutions for modernizing network components while supporting service delivery for customer requirements in a mission-focused operational enterprise. Our team is completely replacing a global enterprise network while providing design, engineering, and transition for a wide range of customer network requirements. This is a unique and rare opportunity to build and transition critical operations to a modern service provider network architecture.

The job duties are as follows:

• Interpret customer requirements and apply standard design approaches for service delivery. Fully document designs with diagrams, bill of materials, cabling sheets, configurations, and other supporting documents.

• Use our private test lab to evaluate new technologies and capabilities, test proposed changes to production networks, and recreate troubleshooting scenarios to support the production enterprise network.

• Schedule maintenance windows for migrating user connections from legacy to the modern infrastructure transition services with little to no impact on critical data flows.

• Provide technical expertise to Operations engineers and technicians, supporting fault isolation and resolution. Solve tough problems with innovative and scalable solutions.

• Develop secure network designs including configurations that align with Defense Information Security Agency (DISA) Security Technical Implementation Guides (STIGs) and enterprise policies. Obtain Authority to Operate (ATO) for new devices, software, and capabilities.

• Supervise (not manage) other network support specialists to plan, coordinate, and implement network services.

• Develop and improve design products, processes, and systems for our team to work efficiently and effectively.

• Although this position is focused on CAN/LAN, this opportunity offers the ability to learn and work on Multiprotocol Label Switching (MPLS) Wide Area Networks (WANs).

Basic Requirements

• Required Clearance: TS/SCI with Poly

• Candidate must have 10 years of experience that can be a combination of work history and education. This equates to a Doctorate and 3 years, master’s and 4 years, bachelor’s and 6 years, associates and 8 years or HS diploma and 10 years.

• Must be compliant with DoD 8140 Information Assurance Technical (IAT) Level 2.

• Experience specific to network engineering to include Tier III or higher network operations and/or network design and implementation.

• Prior responsibility for production network hardware configurations for Cisco, Brocade, and/or Juniper.

• Hands-on experience implementing and troubleshooting standard routing protocols in a production network, such as Open Shortest Path First (OSPF) or Border Gateway Protocol (BGP)

• Hands-on experience implementing and troubleshooting standard switching and trunking protocols in a production network, such as Virtual Local Area Networks (VLANs), 802.1q, and port-channels.

• Network engineering and design experience specific to CAN/LAN. Experience should include application of industry standards, developing configurations, and integration of solutions into production environments.

• Network engineering and design experience with MPLS WANs, network management tools, and firewalls.

• Expert knowledge of routing and switching protocols and the ability to demonstrate knowledge through briefings and documentation. Extensive BGP experience a plus.

• Cisco Certified Network Professional (CCNP) or equivalent knowledge.

• Initiative and disciplined to work unsupervised as part of a network engineering team. Experience establishing process, developing documents, and organizing repositories a plus.

Original Posting:

July 24, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $73,450.00 - $132,775.00

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.