Telecommunications Obsolescence Lead

Lorien are seeking a Telecommunications Obsolescence Lead to join our client and provide support on an estate obsolescence programme to address the withdrawal of their Legacy PSTN/ISDN services across the UK and the ageing telephony platforms deployed throughout their infrastructure, * Own and govern telephony obsolescence risk mitigation decisions across operational sites

• Define and approve acceptable telephony solutions (Legacy, SIP/IP, hybrid or cloud) on a site-by-site basis
• Drive progressive verification of the telephony estate and maintain a prioritised site-level risk view
• Act as the senior technical counterparty to carriers, integrators, and telephony vendors
• Challenge supplier proposals to ensure solutions are safe, operable, and proportionate
• Work closely with a Connectivity Delivery Manager to align sequencing, cutovers, and dependencies

• Senior background in enterprise or industrial telecommunications
• Proven PSTN/ISDN withdrawal, PBX retirement, or large-scale voice transitions
• Strong knowledge of PBX platforms (eg Avaya, Mitel), SIP, SBCs, media gateways, and resilience
• Experience working in operational, safety-critical, or regulated environments