Demo

Network Engineer – Project Lead (Telephony Engineer)

InterSources Inc.
Columbia, SC Contractor
POSTED ON 8/26/2026
AVAILABLE BEFORE 9/25/2026

Network Engineer – Project Lead (Telephony Engineer)
Columbia, SC 29208 - Onsite
6 Months


Required Skills

  • 2 years of experience with Avaya on-premise PBX systems.
  • 2 years administering VoIP and Unified Communications platforms.
  • 2 years of experience with SIP, RTP, QoS, dial plans, call routing, and voice gateway technologies.
  • 2 years troubleshooting voice quality, call routing, carrier connectivity, and E911 services.
  • 2 years supporting telecommunications infrastructure including:
    • Voice circuits
    • Session Border Controllers (SBCs)
    • PSTN integration

Preferred Skills

  • Experience designing, implementing, and supporting enterprise cloud-based telephony solutions.
  • Experience migrating on-premise telephony/PBX environments to cloud-based telephony services.

Responsibilities

  • Provide operational and advanced administration of enterprise telephony and unified communications environments.
  • Handle moves, adds, changes, and disconnects (MACD) for voice and voicemail services.
  • Support conference services, safety devices, telephone IVR, call center environments, vectoring, and unified communications services.
  • Maintain accurate E911/911 location information.
  • Configure, install, maintain, and troubleshoot:
    • Avaya telephony systems
    • Media gateways
    • IP telephones
    • Voice circuits
    • Safety devices
    • Voice networking infrastructure
  • Analyze and troubleshoot vector routing, ARS routing tables, route patterns, dial plans, and call routing.
  • Diagnose voice-quality issues, carrier connectivity problems, PSTN issues, and service outages.
  • Work with telecommunications vendors and carriers to provision circuits and resolve outages.
  • Provide engineer-level support for enterprise telephony and unified communications incidents.
  • Serve as a primary technical escalation point for complex telephony issues.
  • Coordinate with infrastructure, network, vendor, and support teams during outages.
  • Research, design, and implement improvements to the enterprise telephony environment.
  • Perform quality assurance testing for telephony configurations and changes.
  • Monitor telephony and network systems to improve uptime and proactively identify problems.
  • Identify opportunities to automate operational telephony processes and collaborate with automation teams on implementation.
  • Develop and maintain system diagrams, technical documentation, configuration standards, processes, troubleshooting notes, and knowledge-base articles.
  • Follow established Incident Management and Change Management processes.
  • Provide technical recommendations regarding the strategic direction of enterprise telephony services.

Additional Qualifications

  • Strong knowledge of telephone network services and telephone network design.
  • Advanced systems administration knowledge.
  • Ability to clearly communicate technical and non-technical information.
  • Strong customer-service and interpersonal skills.
  • Ability to work effectively with vendors, management, technical teams, and end users.
  • Ability to manage multiple priorities in a fast-paced enterprise environment.

Hourly Wage Estimation for Network Engineer – Project Lead (Telephony Engineer) in Columbia, SC
$45.00 to $53.00
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