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Job #: R-00110979
Location: O'Fallon, IL
Category: Network Administration and Ops
Schedule (FT/PT): Full Time
Travel Required: No
Shift: Day
Potential for Telework: No
Clearance: Top Secret/SCI
Referral Eligibility: Eligible
Referral Bonus Amount: $5000
Group: Defense

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The Leidos Defense group has a career opportunity at Scott AFB for a Voice and Data Network Engineer supporting the Defense Red Switch Network (DRSN).

The successful candidate will support operational sustainment engineering and maintenance of the next generation DRSN IP voice transport network. Systems include Defense Red Switch Network voice transport IP infrastructure, and C2 communication systems. The Position requires deep understanding of and ability to apply principles, theories, and concepts of a given technical domain with a broad understanding of other related specialty areas. The position requires expertise in WAN, LAN networks and Voice over IP (VoIP) within multiple remotely managed environments (DEV/TEST and production infrastructure). In this role, the successful candidate will provide technical assistance, administer configurations, support testing, recommend enhancements, troubleshoot and resolve issues associated with the various network components

Primary Responsibilities: 

  • Establish remote management connectivity, updating the operating systems, coordinating and performing verification test (BER or "burn-in" tests) configuring alarm and system profiles, and configuring/testing various layers of the OSI model.

  • Conduct COMSEC responsibilities; operation and maintenance of associated cryptographic devices and their configurations. 

  • Provide network planning and engineering support for all in-service operational DRSN systems. 

  • Provide technical and operational support for network expansions, and modernization of telecommunications backbone systems.

  • Provide problem resolution for all hardware and software elements of the data communication circuits maintained by the work center to include Commercial and GFE owned networks. 

  • Provide outage and restoration information as required to include restore times. 

  • Ensure the availability of the circuits in coordination with others work centers as required. Perform status updates and circuit monitoring as required. 

  • Work closely with network/systems engineers and site personnel to coordinate deployments and maintenance actions.

  • Evaluate system network requirements and make appropriate technical recommendations.

  • Provide network operations change, configuration, and problem management sustainment and engineering support.

  • Support incident management/fault isolation tier escalation requests. 

Basic Qualifications:

  • Bachelor's degree with 4-8 years of relevant experience. Specific years of related experience, training, and/or certifications accepted in lieu of a degree.

  • Currently possess Security+CE certification.

  • Currently possess a DoD TS/SCI security clearance.

  • Proficiency in at least two or more of the following devices: SONUS SBC, Juniper MX5 routers, Juniper SRX firewalls, Juniper EX switches, KG-175D.

  • Expertise in IP technologies, i.e. networking architectures, methodologies and voice services.

  • Support the maintenance and monitoring activities, network and systems operation and administration; scheduled and unscheduled maintenance, fault isolation, and service restoration. 

Preferred Qualifications:

  • Knowledge of configuring, deploying and supporting HAIPE (KG-175D). Specifically utilizing GD GemOne/Chimera.

  • Ability to interpret network topology diagrams and proposed device configuration changes.

  • Proficiency in at least one of the following tools:  SolarWinds or Junos Space

  • Circuit restoration, fault isolation, quality control testing, trend analysis, performance monitoring, and status reporting experience is desired.


Pay Range:

Pay Range $66,300.00 - $102,000.00 - $137,700.00

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.

About Leidos

Leidos is a Fortune 500® technology, engineering, and science solutions and services leader working to solve the world’s toughest challenges in the defense, intelligence, civil, and health markets. The company’s 45,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $14.4 billion for the fiscal year ended December 30, 2022.  For more information, visit

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [email protected].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to 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.

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