Sr. O&M Network Engineer

Chantilly VA Leidos


The Digital Modernization Sector at Leidos is seeking a Sr. O&M Network Engineer various wide area networks (WANs) and local area networks (LANs). This position will provide routing and boundary protection to an enterprise level infrastructure across multiple classifications and act as subject matter experts in routing and boundary technologies across multiple vendors.

The job duties of Sr. O&M Network Engineer are as follows:                                                                                                       

  • Maintain the security and networking of enterprise boundary enclaves and devices.
  • Tier III O&M of Juniper and Cisco routers to include troubleshooting and implementation of routing updates.
  • Implement new firewall rules along with associated routing to fulfill firewall change requests.
  • Responsible for installing software, applying patches, managing file systems, and monitoring performance of firewall systems.
  • Provide support for Palo Alto, Cisco Adaptive Security Appliance (ASA), and Forcepoint firewall equipment and applications.
  • Generate, determine impact of, and implement custom proxy policies and/or policy exceptions in response to ongoing technology implementation activities on the program.
  • Proxy Subject Matter Expert (SME) for integration of other technologies within the program (function as a SME on ongoing technology projects).
  • Support the troubleshooting of web connectivity problems to determine root cause.
  • Perform Proxy solution component upgrades, testing and configuration.
  • Research and develop evidence collection, protection, and analysis techniques for customer owned and maintained hardware and/or software.
  • Provide real-time monitoring and alerting of security incident investigations on perimeter/internal infrastructure.
  • Provide day-to-day Operations and Maintenance (O&M) support for all incident management events and outages.
  • Collaborate with IT staff on projects and initiatives.
  • Provide input for monthly progress and status reporting of Service Level Agreements (SLAs).
  • 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.

Required Qualifications:

  • Required Clearance: 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. Additional required qualifications include:
  • Must comply with DoD 8570 Information Assurance Technical (IAT) Level 2. 
  • Experience in configuring and troubleshooting boundary protection technologies such as Palo Alto, Cisco ASA, and Forcepoint appliances.
  • Experience with configuring and troubleshooting Juniper and Cisco routers and switches.
  • Experience with protocols such as OSPF, BGP, VPN’s, VRF’s, MPLS.
  • Working knowledge of boundary protection best practices.
  • 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.

Original Posting Date:


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 $87,100.00 – $157,450.00

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.

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