Network Voice Enginer

CACI Network Services; Greater London; Hybrid; GBP 60,000 - 90,000; Full time

Benefits offered by this job

Hybrid work model

Job summary

CACI Network Services, based in London, seeks a Network Voice Engineer to design, deploy and support voice and UC platforms across UK and international sites. You will work on Cisco UC products, CUCM/Jabber/Expressway, and related infrastructure components.

You will contribute to virtualization and storage, monitor systems with Grafana and Splunk, and collaborate in a hybrid work environment with on-site and remote delivery requirements.

Qualifications

• Experience with network infrastructure for voice and video.
• Knowledge of VLAN design, IP addressing and QoS for media traffic.
• Ability to onboard secure devices and manage certificates.
• Firewall administration across Cisco/Fortinet/Palo Alto environments.
• SIP and UC interoperability with Microsoft 365 or similar tools.
• Experience with virtualization and storage platforms (VMware, NetApp).

Responsibilities

• Manage HS and LS voice and video telephony platforms.
• Coordinate partner connectivity UK and overseas.
• Support UC applications infrastructure and virtualization.
• Contribute to monitoring and management tools (Grafana, Splunk).
• Install/configure Cisco VTC endpoints and room systems.
• Handle faults, service requests and escalations.
• Assist in security, backups and disaster recovery tasks.

Skills

Network infrastructure

LAN/WAN fundamentals

VLAN design

IP addressing

Secure device onboarding

Firewall administration

SIP protocol understanding

Interoperability with UC tools

Tools

Cisco UC products

CUCM/Jabber/Unity/Expressway/Meeting Server

Webex Control Hub

Windows Server/Linux

VMware vSphere

NetApp/FlexPod

Cisco UCS/HyperFlex/FlexPod

Job description

Network Voice Engineer

About CACI

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.

About Network Services

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

Key responsibilities

• 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.
• Hardware installation/configuration
• Infrastructure support - Flexpod, NettApps

Other responsibilities could include:

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

Core skills, knowledge and experience required

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

Unified Communications Platforms

• Cisco UC products
• Cisco Unified Communications Manager (CUCM), Cisco Jabber, Cisco Unity Connection, Cisco Expressway, Cisco Meeting Server
• Webex Control Hub administration.
• SIP protocol understanding.
• Interoperability and integration with Microsoft 365 or other UC tools.
• Servers & Storage
• Physical and virtual server installation, configuration, and support (Windows Server, Linux distributions).
• Expertise in virtualisation platforms (VMware vSphere)
• Storage provisioning, replication, and backup solutions.
• Cisco UCS, Hyperflex, FlexPOD
• Netapp

Infrastructure Automation & Monitoring

• Scripting and automation
• Infrastructure as Code (IaC) experience (Terraform, Ansible).
• Splunk, Grafana
• Video Conferencing Systems
• 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.
• Cloud Infrastructure
• Amazon Web Services (AWS) architecture and management.
• Hybrid cloud deployments & integration with on-premise systems.
• Cloud networking, security groups, and resource optimisation.

Expected behaviors

We have a structured performance management framework which measures continual attainment against key personal behaviours. We believe this is an important part of our success and culture. Joining as a team member we expect you to act as a role model and exemplar against these behaviours which are to be:

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

Flexibility

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.

Equal opportunities

CAA 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 favorably 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 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.