TDM/VOIP Migration Engineer

About Ribbon Communications

Ribbon Communications delivers real-time communications software and IP optical networking solutions to service providers, enterprises, and critical infrastructure sectors worldwide. Our innovative technology portfolio helps customers modernize their networks, reduce complexity, and drive new revenue streams-securely and reliably. Backed by decades of engineering excellence, Ribbon supports digital transformation initiatives at scale for many of the world's largest and most demanding networks.
Learn more: ribboncommunications.com/company/about-us/culture

Position Summary

Ribbon Communications is seeking a TDM/VoIP Migration Engineer (Remote Only) to support customer network transformation projects. In this role, you will develop and implement migration strategies to transition legacy TDM networks to Ribbon's VoIP-based architecture. You will play a key role in ensuring successful migrations, including planning, data conversion, subscriber migration, and live cutover execution.

This position is critical to delivering high-quality professional services and fulfilling Ribbon's promise of exceptional customer experiences.

Key Responsibilities

• Define and execute end-to-end migration strategies and cutover plans for transitioning from legacy TDM to Ribbon VoIP platforms.

• Collect, analyze, and map legacy switch data into Ribbon C20-compatible formats.

• Resolve issues related to LNP, E911, voicemail, unsupported line types, and customer group configurations.

• Define migration scope and phase planning for each customer deployment.

• Develop and document comprehensive migration plans and Cutover MOPs (Methods of Procedure).

• Maintain detailed project documentation including sites, schedules, and responsibilities.

• Convert and validate subscriber and feature data from donor switches to target platforms.

• Capture and reconcile live changes (moves/adds/deletes) on donor systems and apply updates.

• Execute programmable subscriber updates and provide real-time support during live cutovers.

Work Schedule & Travel

• This position is remote-only.

• Must be available for off-hours and extended shifts-including nights and weekends-to support live cutovers.

• Occasional travel may be required (up to 25%).

Required Qualifications

• Bachelor's degree in Telecommunications, Electrical Engineering, or related field (or equivalent experience).

• Strong command line and scripting experience with Unix/Linux systems.

• Advanced database and data conversion experience (SQL, MySQL, Oracle).

• Deep understanding of legacy TDM systems and signaling protocols (SS7, R2, PRI).

• Solid IP networking and VoIP knowledge (SIP, RTP, H.323, MEGACO).

• Familiarity with migration methodologies and cutover execution best practices.

• Strong analytical and troubleshooting skills.

• Excellent written and verbal communication skills.

• Meticulous attention to detail with a focus on quality and reliability.

If you're passionate about network transformation and want to work in a hands-on, high-impact engineering role from the flexibility of a remote setting, we encourage you to apply and join Ribbon's world-class services team.