Senior Engineer - GISOCC Infrastructure IS

Responsibilities

> Work in 24x7 environment 

>Support Cisco Unified Communications (UC) platforms, including Cisco Unified Communications Manager (CUCM), Cisco Unity Connection (CUC), Expressway C & E, and Cisco Unified Border Element (CUBE), ensuring high availability and seamless call control across enterprise networks.

>Manage Webex Calling Multi-Tenant environments via Webex Control Hub, including number management, location-based routing, PSTN integration (via Local Gateway/CUBE), and emergency call configurations.

Support operations on User provisioning, features like hunt group, Auto attendant, and shared lines

Configure SIP endpoints and trunks on Cisco CUBE, CUCM, Webex Calling, and AudioCodes SBCs for seamless interoperability with service providers and cloud communication platforms.

Develop and maintain Webex API integrations using Cisco Webex REST APIs to automate user provisioning, de-provisioning, and system monitoring. Utilize tools like Postman and Webex Integration Guides for testing and documentation.

Troubleshoot call quality issues including echo, jitter, and media path inconsistencies using tools such as syslog, CDRs, and SIP debuggers.

Support AudioCodes Mediant SBCs (500, 800, VE, etc.) in enterprise and hybrid environments, including secure configuration for SIP trunking, routing policies, and media negotiation.

KPI Reporting preparation and publishing to stakeholders

 Define Work procedure documentation to keep the day to day activities on live

Work for continuous improvement to meet customer expectations.

Experience / knowledge

• 5 to 8 Years of experience

• Deploy, configure, and support Cisco Unified Communications platforms, including:

• Cisco Unified Communications Manager (CUCM), CUC, Expressway C & E, CUBE

• Experience with Webex Calling Multi-Tenant provisioning, number management, and dial plan configuration via Webex Control Hub.

• Knowledge of location-based call routing, PSTN connectivity (Local Gateway/CUBE), and emergency call routing setup.

• Proficient in managing user provisioning, calling behavior, hunt groups, auto-attendants, and shared line appearance.

• Familiarity with analytics & reporting tools within Webex Control Hub for call usage and troubleshooting.

• Experience with configuring SIP on Cisco CUBE, CUCM, Webex Calling, and AudioCodes SBC

• Strong understanding of SIP signaling, call setup/teardown, and call flow analysis.

• Experience working with Cisco Webex REST APIs for automating user provisioning, deletion 

• Knowledge of Webex Integration Guides, Postman, and API documentation tools

• Experience with AudioCodes Mediant SBCs (500, 800, VE, etc.) in enterprise 

• Ability to integrate AudioCodes SBC with cloud UC platforms like Webex Calling

• Hands-on with call quality troubleshooting, echo, jitter, and media path diagnostics

• Experience deploying and managing AudioCodes Virtual Edition SBCs (VE) on AWS EC2 instances.

• Knowledge of VPC, security groups, Elastic IPs, NAT gateways, and load balancers for VoIP infrastructure.

• Strong understanding of DMZ network architecture and its role in UC and SBC deployments