Senior Cisco UC Engineer – Defence (SC Cleared)

CBSbutler Holdings Limited trading as CBSbutler; Stevenage; On-site; GBP 82,000 - 108,000; Full time

Job summary

CBSbutler is seeking a Senior Cisco Unified Communications Engineer to support and maintain critical telephony and video conferencing infrastructure within a major defence environment. The role is based in Stevenage and requires Active SC clearance.

You will troubleshoot complex incidents, manage CUCM, Unity Connection, Jabber, Webex and related technologies, and contribute to technical documentation and knowledge transfer across operations teams.

Qualifications

• Experience with Cisco CUCM, Unity Connection and Jabber in enterprise environments.
• Proven ability to manage Cisco Webex and video conferencing tech.
• Strong understanding of SIP and H.323 protocols in real-world networks.
• L2/L3 troubleshooting across enterprise Cisco telephony systems.
• Knowledge of Cisco voice gateways and related telephony infrastructure.

Responsibilities

• Troubleshoot Level 2 and 3 incidents in Cisco telephony and video platforms.
• Maintain and support CUCM, Unity Connection and Jabber deployments.
• Manage Cisco Webex, TMS and Pexip video systems and configurations.
• Investigate SIP/H.323 connectivity issues and fixes.
• Support and implement infrastructure changes and projects.

Skills

Cisco CUCM/Unity/Jabber

IP telephony

SIP & H.323

L2/L3 troubleshooting

Video conferencing

Tools

VMware vSphere

VMware vSAN

Kurmi

Telsica

PeterConnects

Job description

CBSbutler is seeking a Senior Cisco Unified Communications Engineer to support and maintain critical telephony and video conferencing infrastructure within a major defence environment. The role is based in Stevenage and requires Active SC clearance.

You will troubleshoot complex incidents, manage CUCM, Unity Connection, Jabber, Webex and related technologies, and contribute to technical documentation and knowledge transfer across operations teams.