Sr Network Engineer

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Derex Technologies Inc
Published
May 8, 2026
Location
Washington, DC
Job Type

Sr Network Engineer: our view in 3 lines...

  • The Role: A senior network engineer role supporting and maintaining mission‑critical 911 and 311 network and data center infrastructure for a government agency.
  • The Person: The person will manage lifecycle upgrades and support of network equipment, maintain detailed network and data center documentation, monitor and troubleshoot network performance and vulnerabilities, and support two mission‑critical data centers.
  • Requirements: Experience with routers, firewalls, switches, servers, Firewalls, VPN, encryption, intrusion detection and prevention systems, and penetration testing is required.

Job Description

Company Description

Derex Technologies Inc specializes in providing IT consulting, staffing solutions and software services. Globally headquartered in Harrison New Jersey since 1996 Derex delivers the highest quality technology professionals and an array of customized IT talent solutions designed to improve productivity and drive results to global clients throughout North America.

With over two decades of unparalleled experience, Derex provides supports to its clientele, across such industries as Systems Integration, Banking and Finance, Telecommunications, Pharmaceutical and Life Sciences, Energy, Healthcare, Technology, Transportation, and local and federal Government agencies.

Job Description

Position: Sr Network Engineer (801988)

Interview: Webcam Only

Job: Onsite

Location: Washington, DC 

 

The role involves supporting the replacement, lifecycle management, and upgrade of networking equipment such as switches, routers, firewalls, and related hardware across the agency’s environment. The specialist develops and maintains detailed network documentation, including logical and physical diagrams, system interfaces, rack elevations, cabling records, and equipment inventories for 911 and 311 operations. They also maintain thorough configuration documentation, standard operating procedures, change records, and disaster recovery materials specific to mission‑critical systems. The position monitors network performance, identifies vulnerabilities or bottlenecks, and implements corrective measures to ensure high availability for 24/7 emergency communications. Additionally, the specialist troubleshoots complex network issues affecting 911 operations, performs root‑cause analysis, and restores service rapidly. The role includes managing and supporting two data centers hosting critical 911 applications, ensuring continuous availability, redundancy, and compliance with public‑safety requirements. 

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CONTRACT JOB DESCRIPTION
Responsibilities:

  1. Knowledge of network analysis related to infrastructure design. 
  2. May be an expert in security or intrusion detection. 
  3. Proficient in proprietary network technology. 
  4. Advanced experience with, but not limited to, routers, firewalls, switches, and servers. 
  5. Advanced knowledge in network analysis. 
  6. Advanced problem resolution and project management skills. 
  7. Designs and implements class wide area networks. 
  8. Experience with Firewalls, VPN, encryption, intrusion detection and prevention systems, and penetration testing. 
  9. Knowledge of network vulnerabilities and be able to mitigate and prevent each one. 
  10. Supporting the replacement, lifecycle management, and upgrade of networking equipment, including core, distribution, and access layer switches; routers; firewalls; and related hardware used across the agency’s network environment 
  11. Creating, maintaining, and improving detailed network diagrams for all agency systems, including logical network maps, physical connectivity diagrams, and system‑to‑system interfaces used by 911 and 311 operations. 
  12. Developing and maintaining rack elevation diagrams, equipment inventories, and cabling documentation for data centers, communications rooms, and remote agency sites 
  13. Preparing and maintaining documentation of network configurations, standard operating procedures, change records, and disaster recovery materials specific to the 911 environment. 
  14. Monitoring network performance and availability, identifying bottlenecks or vulnerabilities, and implementing corrective actions to ensure the resiliency required for 24/7 emergency communications 
  15. Troubleshooting complex network issues affecting critical 911 operations, conducting root‑cause analysis, and restoring service quickly while documenting findings 
  16. Managing and supporting two data centers that host mission‑critical 911 applications, ensuring continuous availability, redundancy, and compliance with public‑safety operational requirements 

Minimum Education/Certification Requirements:
Bachelor’s degree in IT or related field or equivalent experience

 

Regards,

 

Manoj Goud

Derex Technologies INC

Contact : 973-834-5005 Ext 206

Additional Information

All your information will be kept confidential according to EEO guidelines.

Key Skills
? Key Skills in dark blue have been inferred based on similar industry roles
Cisco IOS Routing (BGP/OSPF) Switching (vlans STP) Firewalls Intrusion Detection/prevention (IDS/IPS) Network Diagramming (visio) Data Center Networking Project Management VPN Penetration Testing Disaster Recovery

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