Telecom VOIP Engineer TDM, SONET & Metaswitch

Ziply Fiber is a local internet service provider dedicated to elevating the connected lives of the communities we serve. We offer the fastest home internet in the nation, a refreshingly great customer experience, and affordable plans that put customers in charge.

As our state‑of‑the‑art fiber network expands, so does our need for team members who can help us grow and realize our goals.

• Genuinely Caring: We treat customers and colleagues like neighbors, with empathy and full attention.
• Empowering You: We help customers choose what is best for them, and we support employees in implementing new ideas and solutions.
• Innovation and Improvement: We constantly seek ways to improve how we serve customers and each other.
• Earning Your Trust: We build trust through clear, honest, human communication.

The Principal VoIP Engineer is a senior member of the Voice Engineering team responsible for architecting, designing, implementing, and maintaining enterprise VoIP solutions. This role provides technical leadership in the development of scalable, secure, and highly available voice infrastructure, ensuring optimal performance and alignment with organizational objectives, and serving as SME, guiding strategic voice initiatives, supporting complex deployments, and driving continuous improvement across the voice environment.

The successful candidate will have grown up in TDM/SONET, then transitioned into VoIP/SIP, stayed hands‑on with LERG and numbering, has carrier‑grade experience, and operates at a principal/architect level.

The Essential Duties and Responsibilities listed below are a range of duties performed by the employee and not intended to reflect all duties performed.

• Provide support for SIP and TDM based soft switch translations, facilities and features on the Metaswitch Call Agent and Media Gateways, Enhanced Application Servers, and SBCs.
• Maintaining and updating LERG daily.
• Extensive experience supporting central office switching and softswitch platforms, including legacy TDM systems (e.g., Nortel DMS‑100, Lucent 5
  
  ESS) and modern VoIP/SIP infrastructures.
• Deep expertise in SS7, SIP, PRI, media gateways, and session border controllers, including trunk provisioning, call routing, E911, and inter‑carrier interconnects.
• Proven ability to troubleshoot end‑to‑end voice issues across TDM and IP transport layers, ensuring high availability in geographically redundant central office environments.

• Support Product Engineering with systems architecture planning, system implementation guidelines, and engineering guidelines.
• Perform lab testing, design, and architecture work.
• Architect new VoIP products and features.
• Coordinate with vendors, analyze appropriate product offering and develop new products and services for network.
• Test and approval of new product sets.

• Provide technical assistance and support to other Service Management teams.
• Assist management with all high priority projects and prepare technical presentations.
• Provide off‑hours, on‑call, and weekend coverage as required.
• Limited travel (possibly 10–20%) is required, including potential attendance at conferences and business events such as symposiums.

• Performs other duties as required to support the business and evolving organization.

• 5+ years in telecom engineering with deep TDM and SONET experience
• SIP, RTP, SBCs, ENUM, STIR/SHAKEN expert‑level knowledge
• Hands‑on experience with LERG administration and number management
• Strong background with soft switches (Metaswitch, Ribbon/Genband, Broad Soft, etc.)
• Experience with NPAC, NANPA, number pooling, and LNP processes
• Ability to diagnose complex multi‑layer call failures end‑to‑end
• Proven leadership in designing and operating carrier‑grade networks
• Excellent communication and documentation skills

• Ability to work independently and apply sound judgment and reasoning skills to a variety of situations.
• Ability to multi‑task and collaborate effectively with other personnel to meet…