The Digital Modernization Sector at Leidos is seeking a Tier III O&M Network Engineer to support the customer’s various wide area networks (WANs) and local area networks (LANs). This position will provide routing to an enterprise level infrastructure across multiple classifications and act as subject matter experts in routing technologies across multiple vendors.
The job duties of Tier III O&M Network Engineer are as follows:
Tier III O&M of Juniper and Cisco routers include extensive troubleshooting at the layer 2 and layer 3 level and implementation of routing changes.
Troubleshooting network issues related to connectivity, latency, asymmetric routing.
Implementation of routing and troubleshooting issues related to the following protocols: OSPF, BGP, MPLS, VRF’s, VPN’s
Support technical exchange meetings to help resolve other ISP and application owner issues.
Support problem management to conduct root cause analysis of recurring issues.
Provide day-to-day Operations and Maintenance (O&M) support for incident management events and outages.
Collaborate with IT staff on projects and initiatives.
Work with corresponding technical support teams as required to resolve network traffic concerns.
Utilize monitoring tools and log collectors to provide in-dept analysis of traffic anomalies and issues.
Candidate will be on call after hours on a rotational basis.
Not required but experience with Palo Alto, Cisco Adaptive Security Appliance (ASA), and Forcepoint firewall equipment and applications is a plus.
Requirements
Required Clearance: TS/SCI and 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 comply with DoD 8570 Information Assurance Technical (IAT) Level 2.
Experience with configuring and troubleshooting Juniper and Cisco routers and switches.
Experience with protocols such as OSPF, BGP, VPN’s, VRF’s, MPLS.
Understanding of routing, switching, Internet Protocol (IP) subnet, Network Address Translation (NAT) and security technologies.
Demonstrated ability to engineer and modify rulesets to allow connectivity for new customer requirements.
Demonstrated ability to read, understand, and develop schematic diagrams, technical manuals, and documentation such that the supported equipment and software can be maintained with minimal training.
Working knowledge of Service Now or similar IT Service Management (ITSM) products.
Superior verbal and written communication skills.
Intermediate-level knowledge of MS Office products Word, Excel, PowerPoint, and Visio.
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.
Original Posting:April 24, 2026For 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.
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.
Skills Required
- 16 years of experience in network engineering or related field
- Required clearance: TS/SCI and Poly
- Experience with configuring and troubleshooting Juniper and Cisco routers
- Must comply with DoD 8570 IAT Level 2
- Experience with OSPF, BGP, VPN, MPLS, VRF
Leidos Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.
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Healthcare Strength — Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
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Retirement Support — Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
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Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.
Leidos Insights
What We Do
We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.
