Senior 3rd Line IT Engineer

Senior 3rd Line IT EngineerLocation: London BridgeCompany: 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 OpportunityWe 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 issuesManaging core client infrastructure and cloud environmentsEnsuring centralized security and monitoring platforms run smoothlyYou 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 ResponsibilitiesAct 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 Project team on deployments, migrations, automations, and upgrades across on-premises and cloud environments.Develop and document Standard Operating Procedures (SOPs) to assist the Service Desk with first-response troubleshooting.Contribute to continual service improvement by reviewing recurring incidents and identifying training or process opportunities.Mentor and provide technical guidance to Service Desk engineers.Ensure that all systems and processes align with best practices in cybersecurity, resilience, and

performance.Key Skills & ExperienceProven experience in a 3rd Line / Senior Engineer role within an MSP environmentStrong knowledge of Microsoft technologies, including Azure, 365, SharePoint, and IntuneExcellent understanding of networking, firewalls, VPNs, and Windows Server environmentsExperience with RMM tools, security platforms, and endpoint managementFamiliarity with tools and platforms such as Mimecast, Avanan, SentinelOne, MDR/XDR, Fortinet, Huntress, Datto, and AutotaskStrong troubleshooting, analytical, and communication skillsAbility to work independently and collaboratively across teamsExperience with Cyber Essentials, Cyber Essentials Plus, and other frameworks such as NIST, ISO27001Commitment to producing clear documentation and knowledge sharingDesirable CertificationsMicrosoft Certified: Azure Administrator / Solutions ExpertCompTIA Security+, CISSP, or similar cybersecurity qualificationITIL FoundationVendor-specific certifications (Fortinet, SentinelOne, Datto, etc.)Why Join the CompanyJoin a technically strong, supportive, and collaborative team in central LondonWork across diverse clients, technologies, and industriesPlay a key role in strategic projects and continuous improvement initiativesAccess ongoing training, certifications, and professional development opportunitiesBe part of a company that values reliability, security, and delivering excellent customer serviceSalary:45,000 - 60,000Locality:LondonRegion:LondonEmployment Type:Permanent