Senior 3rd Line IT Engineer

MFK Recruitment
Southwark, Greater London, United Kingdom
5 months ago
Applications closed

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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 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 & Experience
  • Proven experience in a 3rd Line / Senior Engineer role within an MSP environment
  • Strong knowledge of Microsoft technologies, including Azure, 365, SharePoint, and Intune
  • Excellent understanding of networking, firewalls, VPNs, and Windows Server environments
  • Experience with RMM tools, security platforms, and endpoint management
  • Familiarity with tools and platforms such as Mimecast, Avanan, SentinelOne, MDR/XDR, Fortinet, Huntress, Datto, and Autotask
  • Strong troubleshooting, analytical, and communication skills
  • Ability to work independently and collaboratively across teams
  • Experience with Cyber Essentials, Cyber Essentials Plus, and other frameworks such as NIST, ISO27001
  • Commitment to producing clear documentation and knowledge sharing
    Desirable Certifications
  • Microsoft Certified: Azure Administrator / Solutions Expert
  • CompTIA Security+, CISSP, or similar cybersecurity qualification
  • ITIL Foundation
  • Vendor-specific certifications (Fortinet, SentinelOne, Datto, etc.)
    Why Join the Company
  • Join a technically strong, supportive, and collaborative team in central London
  • Work across diverse clients, technologies, and industries
  • Play a key role in strategic projects and continuous improvement initiatives
  • Access ongoing training, certifications, and professional development opportunities
  • Be part of a company that values reliability, security, and delivering excellent customer service

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Where to Advertise Cyber Security Jobs in the UK (2026 Guide)

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Cyber Security Jobs UK 2026: What to Expect Over the Next 3 Years

Cyber Security Jobs UK 2026: roles, salaries and the threat intelligence, cloud security and zero-trust hiring trends shaping UK cyber careers. Cyber security is one of the few sectors where demand for talent has never once dipped. Every major technological shift of the past decade — cloud migration, remote working, AI adoption, the proliferation of connected devices — has expanded the attack surface that security professionals are expected to defend. And every expansion of that attack surface has generated more jobs. But the cyber security jobs market of 2026 is not simply a larger version of what it was three years ago. It is a structurally different market. The threats have evolved, the technologies used to combat them have changed, the regulatory environment has tightened considerably, and the roles being created reflect all of that. A job seeker who understands only the cyber security landscape of 2023 is already working with an outdated map. The candidates who will thrive over the next three years are those who understand where the sector is heading — which specialisms are attracting the most investment, which technologies are reshaping defensive and offensive security practice, and how the definition of a cyber security professional is broadening well beyond the traditional image of a network defender in a SOC. This article breaks down what the UK cyber security jobs market is likely to look like through to 2028 — covering the titles emerging right now, the technologies driving employer demand, the skills that will matter most, and how to position your career ahead of the curve.