Sr. O&M Network Engineer
Company: Leidos
Location: Chantilly
Posted on: April 2, 2026
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Job Description:
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: February 27, 2025 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 $92,300.00 - $166,850.00 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.
Keywords: Leidos, Montgomery Village , Sr. O&M Network Engineer, IT / Software / Systems , Chantilly, Maryland
