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Job details:
Job Title: Principal / Lead Webex Dedicated Instance (DI) Architect
(Immediate Joiners Are Preferred)
Experience: 10+ years in Unified Communications / Voice / Collaboration technologies, with at least 5+ years of architecture ownership in Cisco Webex Dedicated Instance (DI) or large-scale CUCM-to-cloud transformation programmes.
Key Responsibilities
Architecture Leadership & Governance
- Act as the Principal Architect and technical authority for Webex Dedicated Instance across transformation and BAU initiatives.
- Define target-state Webex DI architecture covering call control, clusters, regions, dial plans, PSTN connectivity, SBCs, survivability, and security.
- Establish architectural standards, reusable design patterns, and governance frameworks for Webex DI deployments.
- Own and approve HLDs, LLDs, migration strategies, dial plans, and integration blueprints.
Webex DI Platform & Call Control Architecture
- Architect and govern Webex DI CUCM clusters, including sizing, redundancy, geo-redundancy, and load balancing.
- Define global dial plan and routing strategies, including location-based calling, emergency services, and normalization.
- Design survivability and resilience models including SRST, local gateways, and redundant call routing.
Migration & Transformation Leadership
- Lead large-scale migrations from on-prem CUCM (11.x and above) to Webex Dedicated Instance.
- Define migration approaches for:
- Users, devices, extensions, and DNs
- Voice gateways, trunks, and legacy integrations
- Call features (hunt groups, pickup groups, manager–assistant profiles)
- Drive phased, low-risk execution models aligned with enterprise change governance.
- SIP, PSTN & SBC Architecture
- Architect SIP and PSTN connectivity using Cisco CUBE, AudioCodes, or Ribbon SBCs.
- Design and govern AudioCodes SBC–based integrations for Webex DI, including SIP/TLS, SRTP, media interworking, and enterprise security controls.
- Lead integration of AudioCodes SBCs for Microsoft Teams Direct Routing, PSTN connectivity, and hybrid voice scenarios with Webex DI.
- Govern PSTN models including local gateway, cloud-connected PSTN, and direct provider integrations.
- Ensure secure signalling and media (TLS/SRTP), codec strategies, QoS, high availability, and end-to-end interoperability.
Integration & Hybrid Voice Architecture
- Architect hybrid voice integrations with:
- Microsoft Teams (Direct Routing)
- Webex Calling and on-prem environments
- Contact Center platforms (UCCE / Webex CC)
- Define interworking designs between Webex DI, SBC layers, and enterprise WAN/LAN environments.
Required Technical Expertise
- Unified Communications Platforms
- Cisco Webex Dedicated Instance (DI)
- Cisco CUCM, CUC, IM&P
- Voice gateways and call routing
- Voice & Signalling
- SIP, SDP, RTP/SRTP
- PSTN architectures and emergency calling
- Dial plan design and normalization
- SBC & Network
- Cisco CUBE, AudioCodes, Ribbon SBCs
- WAN/LAN QoS, NAT, firewall traversal
- Hybrid cloud connectivity models
- Cloud & Integrations
- Webex Control Hub
- Microsoft Teams Direct Routing
- Integration with Contact Center platforms
Certifications (Preferred)
- CCNP Collaboration / CCIE Collaboration
- Cisco Webex Calling / DI certifications
- Cloud architecture certifications (advantage)
Skills: sip,cisco,integration,routing,webex,architecture
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