Voice Network Engineer
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Before you apply
SalaryNo pay range posted
LocationBelleville, IL, US
Work modeon-site
Typefull-time
SenioritySenior
Experience5+ yrs
Company size501–1,000 people
PostedJul 15, 2026 · 3mo ago
Verified live14h ago
May no longer be actively hiring
Posted by the company on Jul 15, 2026No pay range listed, though Illinois requires one
At a glanceSummarised by Seekless from the posting.
5+ years experience in a VoIP or telecommunications engineering role
Bachelor's degree in a related field
Must be CCNP Collaborations certified
Hands-on experience with physical network infrastructure (switches, routers)
Extensive experience with Cisco tools and technologies including Cisco Unified Call Manager (CUCM) and Unity
Experience with network implementation and maintenance
Able to demonstrate flexibility in adjusting to variable workload and job duties
Able to interact professionally with all levels of an organization
Must be a US citizen and hold a current Top Secret clearance
Skills
Cisco VoIP
Cisco Call Manager
Cisco Unity
Ribbon VX900
Instant Message and Presence
Teleconference Bridges
Cisco Unified Border Elements
Session Border Controllers
Session Initiated Protocol (SIP)
Asterik
Call Manager Express
SRST
switches
routers
Cisco Unified Call Manager (CUCM)
Overview
Abacus Technology is seeking a Voice Network Engineer to provide infrastructure support of communications networks for an enterprise program at Scott AFB. This is a full-time position.
Responsibilities
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Provide tier 3 engineering and support for voice and communications networks.
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Configure, develop, patch, STIG, enhance, and add features to Cisco VoIP system to include Call Manager, Cisco Unity, Ribbon VX900 devices, Instant Message and Presence and Teleconference Bridges.
•
Develop configurations and methods for Cisco Unified Border Elements, Session Border Controllers, and other network devices that use Session Initiated Protocol (SIP) to connect system to external voice systems.
•
Develop configurations for SIP connections between the VoIP network and other customer networks including Asterik networks, Call Manager Express, SRST, and other Cisco VoIP networks.
Qualifications
5+ years experience in a VoIP or telecommunications engineering role. Bachelor’s degree in a related field. Must be CCNP Collaborations certified. Hands-on experience with physical network infrastructure (switches, routers). Extensive experience with Cisco tools and technologies including Cisco Unified Call Manager (CUCM) and Unity. Experience with network implementation and maintenance. Able to demonstrate flexibility in adjusting to variable workload and job duties. Able to interact professionally with all levels of an organization. Must be a US citizen and hold a current Top Secret clearance.
Applicants selected will be subject to a U.S. government security investigation and must meet eligibility requirements for access to classified information.
EOE/M/F/Vet/Disabled
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