Who are we?At Ensono, our purpose is to be a relentless ally, disrupting the status quo and enabling our clients to Do Great Things. As a trusted technology adviser and managed services provider, we help clients navigate continuous change and embrace innovation.We deliver world-class hybrid cloud, Infrastructure, mainframe transformation, data, IDAM, and cloud-native solutions, simplifying complex business challenges and creating new pathways to success. Headquartered in the USA and backed by private equity, Ensono has a strong track record in the UK and Europe, with growth plans built on trusted partnerships and deep industry expertise.About the role:As an Expert Service Delivery Manager, you will own the end-to-end service relationship for one or more of Ensono's most strategic, mainframe-centric clients. You'll be the executive face of Ensono to CIO/CTO-level stakeholders, orchestrating delivery across z/OS, distributed and cloud platforms, and driving continual service improvement across a highly complex, multi-tower estate. This is a senior, client-facing role for someone who is equally comfortable in an ITIL governance forum, a Sev-1 mainframe incident bridge, and a boardroom QBR.Key responsibilitiesActs as a client advocate and a point of escalations for client service delivery needs, including Sev-1/Sev-2 mainframe incidents.Assigned to Strategic mainframe and hybrid-platform accounts with high profile client visibility and demand for executive stakeholder engagement.Coordinates internally across Ensono with cross-functional teams including Mainframe Operations, z/OS Systems Programming, Storage, Network, Security, and Cloud, to ensure the relationship and services levels are achieved. Provides guidance within Ensono's operational teams to ensure clients have an exceptional experience with the technology solutions we provide and that contractual obligations are met.Actively identifies, captures, and communicates operational risks, insights, opportunities, an