IT - Network & Voice Engineer

Our client is seeking an experienced Network & Unified Communications Engineer to support and maintain enterprise network and voice infrastructure. The role will have a strong focus on Cisco networking and IP telephony, with responsibility for network availability, security, troubleshooting, and the operation of enterprise voice communication platforms.The successful candidate will work closely with infrastructure, security, application, and business teams to maintain reliable network and communication services across the organisation.Key ResponsibilitiesNetwork Infrastructure ManagementManage, monitor, and maintain enterprise network infrastructure across LAN, WAN, wireless, Internet, and remote access environments.Install, configure, maintain, and troubleshoot Cisco switches, routers, firewalls, wireless infrastructure, and VPN solutions.Support network technologies including LAN, WAN, SD-WAN, MPLS, VLAN, routing, switching, and cloud connectivity.Monitor network performance, availability, capacity, and connectivity, proactively identifying and resolving potential issues.Participate in network upgrades, infrastructure refresh, capacity planning, and technology enhancement projects.Cisco Voice & IP TelephonyTake ownership of the organisation's Cisco Unified Communications / IP Telephony environment.Administer and support Cisco Unified Communications Manager (CUCM), including configuration, maintenance, troubleshooting, and system upgrades.Support enterprise IP phones, voice gateways, dial plans, extensions, call routing, and related voice services.Troubleshoot voice quality, call connectivity, registration, and IP telephony-related issues.Work with vendors and internal teams on Cisco voice infrastructure implementation, maintenance, and problem resolution.Support integration between voice platforms and underlying network infrastructure.Network SecurityConfigure and maintain firewall policies, VPN connectivity, network segmentation, and related security controls.Support security vulnerability remediation, firmware upgrades, patching, and network infrastructure lifecycle management.Apply network security best practices and support initiatives to enhance the security and resilience of network and voice infrastructure.Monitoring & TroubleshootingMonitor network and voice infrastructure using enterprise monitoring and logging platforms.Perform root cause analysis and troubleshoot complex network and IP telephony incidents.Support major incidents and coordinate with vendors or relevant technical teams for timely service restoration.Participate in after-hours maintenance windows and production incident support when required.Infrastructure Projects & Change ManagementParticipate in network and unified communications projects, including system upgrades, migration, expansion, and infrastructure refresh.Review and implement network and voice configuration changes in accordance with established change management procedures.Maintain accurate network diagrams, configuration records, technical documentation, and operational procedures.Support disaster recovery, business continuity, and high-availability initiatives.RequirementsBachelor's degree in Computer Science, Information Technology, Information Systems, Engineering, or a related discipline.Minimum 3 years of relevant experience in enterprise network and/or unified communications environments.Hands-on experience with Cisco Unified Communications Manager (CUCM) is mandatory.Strong experience supporting Cisco IP Phones / IP Telephony / Unified Communications environments.Solid hands-on experience with Cisco enterprise networking, including routing, switching, wireless, VPN, and network security.Strong understanding of TCP/IP, VLAN, OSPF, BGP, STP, HSRP/VRRP, DHCP, DNS, NAT, QoS, and related networking technologies.Experience with Cisco Catalyst, Nexus, Meraki, or equivalent enterprise networking platforms.Experience with next-generation firewalls such as Palo Alto, Cisco Firepower, Fortinet, or equivalent.Experience with SD-WAN, MPLS, Internet WAN, or cloud connectivity is an advantage.Strong troubleshooting and problem-solving skills across both network and voice environments.Good communication and stakeholder management skills.Able to work independently and collaborate effectively with internal teams and external vendors.Preferred Skills & CertificationsCisco Certified Network Associate (CCNA) or CCNP preferred.Cisco Unified Communications / Voice certification or relevant Cisco Collaboration / Voice certification is highly advantageous.Experience with Cisco CUCM, Cisco Unity Connection, Cisco IM & Presence, SIP, VoIP, and voice gateways is preferred.Familiarity with network monitoring platforms such as PRTG, SolarWinds, or equivalent.Experience with SAN/NAS or other enterprise infrastructure is an advantage.ITIL certification or experience with ITSM / incident / change / problem management is a plus.