Senior Cisco Unified Communications Engineer

CBS Butler; Purbrook; On-site; GBP 82,000 - 108,000; Full time

Job summary

Qualifications

• Hands-on experience with Cisco Unified Communications systems.
• Experience with SIP and H.323 protocols in enterprise environments.
• Proven ability to troubleshoot L2/L3 incidents in complex UC environments.

Responsibilities

• Troubleshoot and resolve Level 2/3 incidents across Cisco telephony and video conferencing infrastructure.
• Maintain Cisco UC environments (CUCM, Unity Connection, Jabber, IP Phones).
• Support Cisco Webex and video conferencing tech (TMS, Pexip).
• Investigate SIP/H.323 connectivity and configs.
• Support hardware/software requests and ongoing projects.
• Maintain technical documentation and runbooks.
• Provide guidance and knowledge transfer to operations teams.

Skills

CUCM

Unity Connection

Jabber

IP Telephony

SIP

H.323

Webex

Pexip

L2/L3 troubleshooting

WAN/LAN networking

Network security

Windows administration

Tools

VMware vSphere

vSAN

Kurmi

Telsica

PeterConnects

Job description

Job title: Senior Cisco Unified Communications Engineer

Rate: £515 per day inside IR35

Contract: 4-month rolling

Location: Portsmouth

Active SC clearance is required for this role

We're looking for a technically strong Cisco Unified Communications Engineer to support and maintain critical telephony and video conferencing infrastructure within a major defence environment.

This is a hands‑on engineering role where you'll take ownership of complex technical issues, support enterprise collaboration platforms and help ensure the continued reliability and performance of essential communications services.

Responsibilities:

• Troubleshooting and resolving complex Level 2 and Level 3 incidents across Cisco telephony and video conferencing infrastructure.
• Supporting and maintaining Cisco Unified Communications environments, including CUCM, Unity Connection, Jabber and Cisco IP Phones.
• Managing and supporting Cisco Webex and video conferencing technologies, including TMS and Pexip.
• Investigating and resolving SIP and H.323 connectivity and configuration issues.
• Supporting hardware and software requests, infrastructure changes and ongoing technical projects.
• Maintaining technical documentation, operational procedures and knowledge bases.
• Providing technical guidance and knowledge transfer to wider operations teams.

Expereince Required:

You'll bring strong hands‑on experience across Cisco Unified Communications, particularly:

• Cisco CUCM, Unity Connection, Jabber and IP telephony.
• Cisco Webex and video conferencing infrastructure.
• Cisco voice gateways and associated telephony infrastructure.
• SIP and H.323 protocols.
• L2/L3 troubleshooting within enterprise environments.

Desirable experience:

• VMware vSphere and vSAN.
• Kurmi, Telsica and PeterConnects.
• WAN/LAN networking and network security.
• Windows environments and general systems administration.