Hiring: Voice Network Engineer Company: Abacus Technology Corporation Location: Belleville, IL Job Posted Time: 2026-09-03 14:16:51 Employment Type: Full-time Target Skills & Keywords : Top Secret Clearance About the job Required Skills: •Provide tier 3 engineering and support for voice and communications networks. •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: •Applicants selected will be subject to a U.S. government security investigation and must meet eligibility requirements for access to classified information. Compensation: •Flexible work environment (work from home / hybrid options) Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!