Voice Engineer

Overview

In this role you will design, implement, and optimize enterprise voice and unified communications to deliver reliable, secure, and high-performing telephony services. You will work with SIP-based systems, contact centre technologies, and vendor/carrier integration to ensure resilient voice delivery.

You will diagnose issues, drive improvements, and support migrations and upgrades as part of IT Operations. This position offers a chance to shape Radius’s voice strategy and improve call quality at scale. You will collaborate closely with cross-functional teams to realise strategic goals for communications.

Pay / Benefits

• Pension
• Life assurance
• Employee fuel card scheme
• Electric Vehicle scheme
• Employee assistance programme
• Wellness and healthcare assistance via Help@Hand by Unum

Responsibilities

• Design, deploy and maintain enterprise voice and unified communications platforms
• Manage SIP trunks, SBCs, call routing and dial plans
• Support cloud telephony platforms, including contact centre solutions
• Maintain voice platform availability, resilience and performance
• Investigate and resolve voice-related incidents and service requests
• Diagnose SIP signalling, media flow and call quality issues
• Collaborate with providers and vendors to resolve carrier issues
• Perform root cause analysis and implement preventative measures
• Support voice network requirements (QoS, firewalls, routing and security)
• Assist with telephony migrations, upgrades and transformation projects
• Support disaster recovery and business continuity for voice services
• Proactively monitor voice environments and service performance
• Identify opportunities to improve call quality, reliability and operational efficiency
• Produce reports on service availability, utilisation and performance
• Maintain technical documentation, architecture diagrams and procedures
• Develop and maintain voice engineering standards and best practices
• Support audit, compliance and security requirements relating to voice services

Key requirements

• Proven experience with enterprise level voice and collaboration platforms and call recording/reporting solutions
• Strong experience supporting SIP-based voice solutions
• Knowledge of Microsoft Teams Phone including Direct Routing and Operator Connect
• Excellent understanding of SIP signalling, RTP and VoIP
• Experience with Session Border Controllers
• Knowledge of carrier connectivity, SIP trunking and number management
• Experience supporting cloud telephony and contact centre platforms
• Ability to troubleshoot complex voice and call quality issues
• Strong networking fundamentals (TCP/IP, DNS, DHCP, VLANs, QoS, firewalls, routing)
• SIP/VoIP
• Session Border Controllers (SBCs)
• SIP trunking and carrier connectivity
• Microsoft Teams Phone (Direct Routing, Operator Connect)
• VoIP call quality troubleshooting
• QoS, firewalls, routing

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