Zoom Telephony Architect

12 hours ago
Phoenix, AZ, United States E-Solutions Full-time
Zoom Telephony Architect

Location: Phoenix, AZ (Onsite) Key Responsibilities

Lead end-to-end Cisco UC to Zoom migration projects, including assessment, design, planning, and execution Analyze existing Cisco UC infrastructure (CUCM, Unity Connection, IM & Presence, Expressway, CUBE) and define migration strategies Design hybrid/coexistence architectures to support phased migrations Migrate users, numbers, dial plans, call flows, voicemail, and auto-attendants from Cisco to Zoom Configure and administer Zoom Phone, Zoom Meetings, and Zoom Rooms Integrate Zoom with existing enterprise systems (AD, SSO, SIP trunks, PSTN providers) Execute number porting, SIP trunk migrations, and PSTN cutovers Perform detailed testing, validation, and user acceptance before cutover Troubleshoot complex voice, video, and signaling issues during migration Develop migration runbooks, rollback plans, and technical documentation Provide post-migration optimization and stabilization support Required Skills & Experience

5–10 years of experience in Unified Communications / Collaboration engineering Strong hands-on expertise in Cisco UC including:

CUCM, Unity Connection, IM & Presence Cisco CUBE and SIP normalization

Proven experience migrating Cisco UC environments to Zoom Phone Strong understanding of SIP, RTP, codecs, call flows, and dial plans Experience with enterprise PSTN connectivity, number porting, and carrier coordination Strong hands-on experience with Zoom UC platforms, especially Zoom Phone Solid understanding of VoIP fundamentals (SIP, RTP, codecs, call flows) Solid networking knowledge (QoS, VLANs, firewalls, NAT, SBCs)

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