Sr. Network Design Engineer

Leidos LLC; Alice Springs; On-site; AUD 180,000 - 240,000; Full time

Benefits offered by this job

Health and Wellness programs

Paid Leave

Retirement plan

Job summary

Leidos seeks a Senior Network Design Engineer for CAN/LAN to support a government customer’s global enterprise networks. The role focuses on modernizing network components, documenting designs, and transitioning to a new service provider architecture.

The ideal candidate brings TS/SCI with Poly, 16+ years of combined work/education, and hands-on experience with Cisco, Brocade, Juniper, OSPF, and BGP. Expect responsibilities across design, implementation, and operations within a

Qualifications

• Active TS/SCI with Poly clearance required.

Responsibilities

• Interpret customer requirements and apply standard design approaches for service delivery.
• Fully document designs with diagrams, BOMs, cabling sheets, configurations, and related docs.
• Use private test lab to evaluate new technologies and test changes to production networks.
• Schedule maintenance windows with minimal impact to data flows.
• Provide technical expertise to Operations engineers and technicians for fault isolation and resolution.
• Develop secure network designs aligned with DISA STIGs and enterprise policies.
• Obtain Authority to Operate (ATO) for new devices and capabilities.
• Supervise network support specialists to coordinate and implement services.
• Develop and improve design products, processes, and systems for efficiency.
• Optionally learn and work on MPLS WANs beyond CAN/LAN.

Skills

TS/SCI with Poly

Network engineering

OSPF

BGP

VLANs/802.1q/port-channels

Documentation

Unsupervised work

ATO/Certifications

Education

PhD or equivalent experience in network engineering

IAT Level 2 Information Assurance

Tools

Cisco equipment

Brocade equipment

Juniper equipment

Firewall configurations

Job description

The Digital Modernization Sector at Leidos has an opening for a Sr. Network Design Engineer (Campus Area Network/Local Area Network (CAN/LAN)) to support our government 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).

Minimum Requirements

Active TS/SCI with Poly Candidate must have 16 years of experience that can be a combination of work history and education. This equates to a Doctorate and 8 years, master’s and 10 years, bachelor’s and 12 years, associates and 14 years or HS diploma and 16 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.

Desired Qualifications

• 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 is a plus.

If you’re looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We’re not hiring followers. We’re recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We’re already at step 30 - and moving faster than anyone else dares.

Pay Range

The Leidos pay range for this job level is a general guideline only and 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.

Pay and Benefits

Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.