Network Specialist – Telephony Systems
Listed on 2026-09-01
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IT/Tech
Telecoms Engineering, Systems Engineer, IT Specialist -
Engineering
Telecoms Engineering, Systems Engineer, IT Specialist
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Technical Recruiter @ Network Designs, Inc. | We’re hiring cleared professionals for a high-impact Unified Communications program supporting the FBIAbout NDi:
Network Designs, Inc. (NDi) is a leading Federal contractor that specializes in designing, developing, and delivering information technology and network solutions for government customers. Founded in 1985, NDi's firmly defined core values have driven all aspects of the business, which have been paramount to our company's success and the establishment of an enjoyable workplace atmosphere. At NDi, we believe that our people are the cornerstone of our success, and we value collaboration, career growth, and winning ideas.
Military Veterans Encouraged to Apply.
Job Description:
We are seeking a technically skilled and hands-on Network Specialist to support the backend configuration, deployment, and troubleshooting of enterprise telephony systems, including Avaya and Microsoft Teams Voice environments. This role focuses on network-layer support of VoIP systems in a Cisco infrastructure and involves configuration of access layer switches, gateways, SBCs, and physical telecom cabling. The ideal candidate has strong networking knowledge, voice infrastructure experience, and is comfortable working in a secure government setting.
Requirements:
- U.S. Citizenship is required
- Must possess an active TS clearance at the time of application, be willing and able to obtain SCI access, and pass a CI polygraph.
- This position is onsite 5/days a week in Washington D.C.
Qualifications and Experience:
- Bachelor's Degree in Network Engineering, Information Systems, Telecommunications, or a related field
- Minimum 5 years of experience in network engineering or infrastructure support, with hands-on experience in voice networking.
- Proficiency in Cisco switch configuration, including VLANs, PoE, and access port management.
- Experience configuring and supporting Cisco CUBE, Cisco Voice Gateways, and Cisco ATAs.
- Working knowledge of Oracle SBCs and integration with VoIP systems.
- Ability to troubleshoot and resolve VoIP quality issues at Layers 2 and 3.
- Hands-on experience provisioning and supporting Polycom VoIP phones in an enterprise setting.
- Familiarity with MDF/IDF telecom wiring and structured cabling best practices.
- Strong attention to detail and ability to follow strict security and configuration protocols
Preferred Qualifications:
- Certifications such as CCNA, CCNP, or equivalent networking credentials
- Experience in secure or classified federal environments.
- Familiarity with Microsoft Teams Voice and Avaya platforms.
- Experience documenting network configurations using Visio or similar tools.
Responsibilities:
- Switch Configuration: Configure Cisco access layer switches, including VLANs, Power over Ethernet (PoE), and port settings to support IP telephony deployments.
- Layer 2/3 Troubleshooting: Identify and resolve Layer 2 and Layer 3 issues impacting voice services, including call quality, network segmentation, and traffic flow.
- Telecom Cabling: Perform telecom cabling and wiring in MDFs and IDFs to support physical VoIP infrastructure and connectivity.
- Voice Gateway & SBC Configuration: Configure and troubleshoot Cisco CUBE and Oracle Session Border Controllers (SBCs) for VoIP integration.
- Gateway Support: Configure and maintain Cisco Voice Gateways (e.g., VG410), supporting analog and digital voice connectivity as part of the unified communications environment.
- ATA Configuration: Install and troubleshoot Cisco Analog Telephone Adapters (ATAs) to support legacy analog devices within an IP telephony environment.
- VoIP Phone Provisioning: Provision, deploy, and troubleshoot Polycom VVX 300/400/500 series VoIP phones in coordination with Microsoft Teams or Avaya telephony backends.
- Collaboration & Support: Work closely with telephony engineers, network teams, and IT support to deliver and maintain reliable…
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