Systems Consultant (3rd Line / Infrastructure) - Hybrid Working - £55,000!
Role: Systems Consultant
Location: London (Hybrid – 3 days onsite / 2 days remote)
Salary: £45,000 - £50,000 (DOE)
A highly respected London-based Managed Service Provider is looking for a Systems Consultant / 3rd Line Infrastructure Engineer to join their growing Infrastructure Services team.
This role is ideal for an experienced 2nd or 3rd Line Engineer within an MSP who wants to move into a more consultative, customer-facing infrastructure position, working with modern cloud-first and security-led environments.
You'll play a key role in supporting and improving client infrastructure while developing deeper expertise across Microsoft cloud, security, and enterprise infrastructure technologies.
The Role
As a Systems Consultant, you’ll operate as a senior escalation point within the infrastructure team, supporting complex technical environments across multiple clients.
You’ll work closely with Service Desk, Professional Services, and Account Management teams to ensure the stability, security, and scalability of client IT environments.
This position also offers the opportunity to develop into a technical authority or future infrastructure architect within a fast-growing MSP.
Key Responsibilities
Act as a 3rd line escalation point for complex infrastructure incidents
Troubleshoot and resolve business-critical technical issues, including root cause analysis
Support and contribute to major incident management and post-incident reviews
Deliver proactive infrastructure improvements, including monitoring, patching, and optimisation
Provide technical oversight for changes, upgrades, and infrastructure improvements
Contribute to automation, platform standardisation, and service improvements
Support security posture, backup, business continuity, and disaster recovery solutions
Develop into a Subject Matter Expert (SME) for key technologies and vendor platforms
Provide mentorship and guidance to 1st and 2nd Line engineers
Maintain clear technical documentation and communicate effectively with customers
Occasional client site visits may be required for workshops, escalations, or technical meetings.
Technical Environment
You’ll be working across modern cloud and infrastructure technologies, including:
Microsoft 365
Microsoft Azure (IaaS, identity, networking, security)
Windows Server
Active Directory / Entra ID
Group Policy
Virtualisation (VMware / Hyper-V)
Advanced networking (VPNs, routing, switching, firewalls)
Backup & disaster recovery platforms
Automation & scripting
Cyber security technologies and controls
Experience Required
2–3+ years in a 2nd / 3rd Line or Infrastructure role
Experience working within an MSP or multi-client IT environment
Strong troubleshooting and root cause analysis skills
Comfortable supporting complex infrastructure environments
Experience across Microsoft cloud and on-prem infrastructure
Desirable Skills
Microsoft certifications (e.g. Azure Administrator – AZ-104)
Experience with Microsoft 365 administration and identity services
Exposure to AWS or Google Cloud
Experience with RMM and PSA tools
Knowledge of backup platforms (e.g. Veeam, Datto)
Exposure to SIEM / SOC tools
Understanding of AI tools such as Microsoft 365 Copilot
Linux administration experience
The client is looking to fill this opportunity immediately, so please apply ASAP or feel free to drop me an email with any questions to owen @ serlimited . com.
SER-IN
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