Lead Webex Dedicated Instance (DI) Architect

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 pro

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)

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