Senior Voice or Collaboration Engineer

TechStar Group; Hyderabad, Bengaluru; Remote; INR 1,500,000 - 2,100,000; Full time

Job summary

TechStar Group in Hyderabad, India seeks a Senior Voice/Collaboration Engineer to lead implementation, migration and cutover of Cisco voice environments. You will own CUCM, SIP/CUBE, PSTN services, and Unity Connect deployments, coordinating with carriers and sites.

This remote-capable role requires hands-on expertise, strong troubleshooting using CUCM RTMT, SIP traces, and Five9 integration for contact centers. Travel onsite for critical site cutovers when needed.

Qualifications

• 8+ years hands-on Cisco Voice/Collaboration experience.
• Expertise with CUCM, SIP/CUBE, PSTN, Unity Connection and migrations.
• Strong carrier coordination and site cutover capabilities.

Responsibilities

• Build and configure the on-prem Cisco UC environment including CUCM.
• Configure SIP connectivity, call routing, and carrier integration.
• Migrate endpoints and re-register VoIP devices into the new voice environment.
• Lead site-by-site cutovers with validation, testing, rollback and hypercare.

Skills

CUCM

SIP/CUBE

VoIP/UC

Tools

Five9 integration

Job description

Role & responsibilities

\"Senior Voice / Collaboration Engineer

Job Description

Resources 1

Experience 8+ years

Primary Focus Local CUCM, SIP/PSTN, CUBE, Unity and site voice migration

Work Model Remote with onsite support for larger/critical site cutovers where required

Role Summary

Senior hands-on engineer responsible for implementation, migration and cutover of the local Cisco voice

environment. The role requires deep experience with CUCM, SIP/CUBE, PSTN services, endpoint migration,

carrier coordination and site-level voice dependencies.

Key Responsibilities / Implementation Scope

• Build and configure the local/on-premises Cisco Unified Communications environment, including CUCM

Publisher and Subscribers, Cisco Unity Connection, CUBE/voice gateways, device pools, regions,

locations, partitions, Calling Search Spaces, route groups, route lists, route patterns, translation patterns

and dial plans.

• Configure and validate SIP connectivity and call routing between CUCM, CUBE, carriers, contact-center

platforms and other voice systems.

• Support setup and testing of new SIP/PSTN services and coordinate with carriers for circuit activation,

DID allocation, number porting and production service validation.

• Configure and troubleshoot CUBE and voice gateways, including dial peers, SIP profiles, codec

negotiation, DTMF, RTP/SRTP, TLS, media flow and number manipulation.

• Migrate and re-register Cisco IP phones, softphones, conference devices and other VoIP endpoints into

the NewCo voice environment.

• Configure and validate voice VLANs, DHCP options, DNS/NTP dependencies, QoS policies, gateway

connectivity and network reachability required for voice services.

• Migrate DIDs, extensions, toll-free numbers, voicemail boxes, auto attendants, hunt groups, callforwarding rules and call-routing configurations.

• Support Five9/contact-center integration, including SIP connectivity, DID routing, inbound/outbound

customer call flows, failover and end-to-end call validation.

• Validate and migrate analog lines, fax, paging/PA systems, emergency or site-specific voice

dependencies where applicable.

• Execute site-by-site cutovers covering pre-cutover validation, endpoint migration, number-porting

coordination, testing, rollback support, issue resolution and hypercare.

• Provide onsite implementation support for larger/critical sites and remote deployment support for smaller

sites as required.

• Troubleshoot using CUCM RTMT, CUBE/IOS logs, SIP traces, packet captures, debugs and call-detail

records.

Required Technical Skills

Area Required Hands-on Experience

Cisco Collaboration

CUCM Publisher/Subscriber, Cisco Unity Connection, Cisco IP Phones, devicregions, locations, partitions, CSS, route patterns, route lists/groups, translatipatterns and SRST concepts.

SIP / CUBE SIP trunks, dial peers, SIP profiles/normalization, DTMF, codec negotiation,

RTP/SRTP, TLS, media flow and carrier integration.

PSTN / Numbering PSTN services, DIDs, toll-free numbers, number porting, inbound/outbound cand carrier coordination.

Network Dependencies Voice VLANs, DHCP, DNS, NTP, QoS, gateway connectivity, routing and pac

troubleshooting.

Contact Center / Legacy Voice Five9 integration, analog gateways/lines, fax, paging/PA and site-specific teledependencies.

Migration & Cutover Site migration planning, cutover execution, rollback, testing, hypercare and as

documentation.

Certification Requirements

Mandatory: Cisco voice/collaboration certification required. Acceptable senior credentials include Cisco

Certified Specialist - Collaboration Core (350-801 CLCOR), CCNP Collaboration, or CCIE Collaboration.

Preferred / Advantageous: Relevant Collaboration concentration credentials such as CLACC/CLHCT and

prior enterprise voice migration experience.

Required Deliverables

• Low-level design / configuration workbook

• Implementation runbook / Method of Procedure (MOP)

• Site cutover and rollback plans

• Voice test scripts and validation evidence

• As-built configuration and operational handover documentation\"

Preferred candidate profile