Infrastructure Engineer / Systems Engineer (M365, Cyber Security)
£45,000 – £55,000 | Portsmouth | Full-time onsite
You’re the person people turn to when the issue isn’t straightforward.
The one who understands how the environment fits together.
The one who doesn’t just fix the problem but thinks about why it happened and how to stop it happening again.
This role is for an Infrastructure Engineer who enjoys a mix of 3rd line BAU support and meaningful project delivery across the systems / infrastructure engineering environment, within an organisation that takes IT, security, and resilience seriously.
It’s a hands-on, trusted role where your technical judgement matters.
What’s in it for you?
* Salary : £45,000 – £55,000
* Location : Portsmouth (full-time onsite)
* Role type : Infrastructure / systems engineering
* Balance : BAU ownership alongside structured project work
* Exposure : Infrastructure, Microsoft cloud, endpoint management and cyber security
* Influence : Real input into standards, tooling, and how things are done
What you’ll be doing
* Acting as a senior technical escalation point across the infrastructure estate
* Supporting and improving on-prem systems including servers, storage, and core services
* Delivering infrastructure and security-focused projects from design through to implementation
* Working across the Microsoft stack, including:
* Microsoft 365
* Intune and device management
* Entra ID / identity and access
* SCCM
* Playing an active role in cyber security initiatives, including endpoint protection, vulnerability management, and responding to security findings
* Supporting penetration testing activity and helping implement recommendations
* Contributing to change control, documentation, and technical standards
* Working closely with senior stakeholders to explain risks, options, and decisions in plain English
* Helping improve resilience, security posture, and long-term infrastructure planning
What you’ll bring
* Strong experience in a 3rd line / infrastructure engineering role
* Solid knowledge of Windows Server environments, on-prem infrastructure, and core networking concepts
* Good hands-on exposure to Microsoft 365, Intune, Entra ID, and endpoint management
* Awareness of cyber security principles, vulnerability management, and modern endpoint protection
* Confidence delivering technical projects, not just supporting them
* A methodical approach to change, documentation, and risk
* Clear communication skills and the confidence to challenge when needed
This role suits someone who enjoys being trusted with complex environments, likes getting stuck into both technical problems and projects, and wants to work somewhere that values doing things properly.
Interested?
Apply or send your CV to bob.bath@mexasolutions.com and let’s have a confidential chat.