Senior 3rd Line IT Engineer Location: London Bridge Company: Managed Service Provider (MSP) This role will be office-based for the first 3 6 months, with the option to move to a hybrid working arrangement thereafter. Our client is a well-established MSP based in London Bridge. They are a close-knit team of 30 IT professionals delivering end-to-end technology services and support to a diverse range of clients, with a strong focus on reliability, security, and customer care. The Opportunity We are seeking an experienced Senior 3rd Line Engineer to join our growing technical team. This pivotal role involves: Acting as the go-to escalation point for complex issues Managing core client infrastructure and cloud environments Ensuring centralized security and monitoring platforms run smoothly You will work closely with our Service Desk and Project teams, maintaining high service standards, documenting solutions, and mentoring junior engineers through effective Standard Operating Procedures (SOPs). Senior 3rd Line IT Engineer - Key Responsibilities Act as the primary escalation point for complex 2nd/3rd line incidents and service requests across infrastructure, networking, Azure, Microsoft 365, and cybersecurity. Manage and maintain client systems and centralized services, including Mimecast, Avanan, SentinelOne, MDR/XDR, Fortinet, DR/BC, Huntress, Autotask, and Datto RMM. Provide and present clients with centralized services reports and cybersecurity reviews. Collaborate with the