Unified Collaboration Infrastructure Engineer

From our headquarters in London, we’re busy empowering organisations to make bold, strategic moves with the power of data and technology. Founded in 1975, our operations take place from multiple offices across the UK, Europe and India with over 1600 full‑time employees and an annual turnover of £179m.

Our expertise spans industries, from retail and education to public sector and transport – delivering intelligent solutions that drive progress and create measurable impact. Whether it’s business intelligence, customer marketing, cloud infrastructure, cybersecurity, critical national infrastructure or data management, our approach is never one‑size‑fits‑all.

We don’t just deliver solutions; we build for the tomorrow’s world, all while fostering a culture that allows employees to be their authentic selves and succeed in their careers.

CACI Network Services is a rapidly expanding specialist IT and Networks consultancy offering a wide variety of opportunities to work within challenging and exciting environments with our major clients in Global Media, Banking, Government, Telecoms & Utilities

• HS and LS Voice and Video telephony platforms.
• Partner Connectivity across the UK and overseas
• Underlying infrastructure to support UC Applications
• Develop additional UC skills to aid in the support of other UC Team Collaboration
• Tools and Audio‑Visual and Managed Events capability to help create a multidisciplinary team.

• Faults and service requests
• Technical escalations
• Contribute to the Internal monitoring and management tools (Grafana, Splunk and python based tools, Ansible)

• LAN/WAN fundamentals, QoS for video and voice traffic.
• Secure device onboarding and certificate management.
• Firewall administration (Cisco ASA/Firepower, Palo Alto, Fortinet)

• Cisco Unified Communications Manager (CUCM), Cisco Jabber, Cisco Unity Connection, Cisco Expressway, Cisco Meeting Server
• Webex Control Hub administration.
• Interoperability and integration with Microsoft 365 or other UC tools.

• Physical and virtual server installation, configuration, and support (Windows Server, Linux distributions).
• Expertise in virtualisation platforms (VMware vSphere)
• Storage provisioning, replication, and backup solutions.
• Netapp

• Scripting and automation
• Infrastructure as Code (IaC) experience (Terraform, Ansible).
• Splunk, Grafana
• Deploy, configure, and troubleshoot Cisco VTC endpoints (Room Kits, Webex Boards, SX/MX series, Desk series).
• Knowledge of Zoom Rooms, Microsoft Teams Rooms, and interoperability gateways.
• Amazon Web Services (AWS) architecture and management.
• Hybrid cloud deployments & integration with on‑premise systems.
• Cloud networking, security groups, and resource optimisation.

• Proactive
• Adaptable
• Flexible
• A team player
• Reliable

The key to our success is our teamwork and collaboration. We take a hybrid approach – working remotely and coming into the office depending on the business demand and collaboration required as part of the delivery process.

CACI is proud to be an equal employer. Embracing the diversity of our people, we are on a journey to build a truly inclusive work environment where no one is treated less favourably due to ethnic origin, age, gender, veteran status, religion or belief, sexual orientation, marital status, and disability or health condition, actively working to prevent discrimination.

As a Disability Confident employer, we will:

• Provide reasonable adjustments in the recruitment process where requested (contact a member of the recruitment team on  to discuss individual requirements further).
• Offer people with health conditions and disabilities, meeting the minimum criteria for a role, an interview.

Our people are unique, and we encourage, and support them, to be confident in contributing to our inclusion journey.