Senior VoIP Infrastructure Engineer

As the Senior VOIP Infrastructure Engineer, I expect you to serve as the service owner for enterprise VOIP and Unified Communications platforms. You will define and deliver the roadmap for VOIP technologies in alignment with our digital strategy and act as the senior escalation point for all VOIP-related incidents and problems. Your responsibilities will include leading the design, implementation, and migration of enterprise telephony services (Cisco Call Manager, SIP/Cloud platforms) and managing the transition from ISDN-based services to SIP/cloud voice solutions, ensuring resilience and cost-effectiveness. You will oversee the integration of VOIP with core network, data center, and security infrastructures, ensuring high availability and optimal performance of VOIP services through proactive monitoring, capacity planning, and fault resolution. Additionally, you will develop and maintain disaster recovery strategies for voice systems, produce and maintain high- and low-level documentation and operational procedures, and lead enterprise-wide voice infrastructure projects from planning to deployment and support. Collaboration with Estates, Facilities, and third-party vendors is key to delivering end-to-end solutions. You will present technical designs to senior managers and stakeholders, ensuring understanding and alignment while providing technical leadership and mentoring to infrastructure engineers.