Overview
As a Senior Systems Engineer within our IT Managed Services, you will provide third-line expertise in Windows server and cloud infrastructure technologies. This role is pivotal in maintaining system stability and resolving complex incidents across our customer base. You will combine deep technical ability with a strong service ethic, ensuring timely resolution and sharing knowledge to uplift those around you. This is a shift-based role forming part of a 24x7 squad, responsible for live service health, incident resolution, change implementation, and proactive operations.
What You Will Do
* Provide expert-level technical support across Windows Server, Active Directory, Microsoft Azure, Microsoft 365, and virtualization platforms.
* Lead on resolution of complex incidents and problems escalated by Systems Engineers and Analysts.
* Implement standard changes, patching, backup management and platform upgrades across customer environments.
* Act as technical escalation point within the squad and during shift; maintain clear records within ITSM tooling.
* Collaborate with engineers across shifts to ensure accurate handovers and continuity of service.
* Use CMDB, dependency mapping and monitoring insights to support root cause analysis and reduce recurrence.
* Contribute to and enhance operational runbooks and knowledge articles in ServiceNow.
* Support continual service improvement by identifying trends and recommending monitoring, automation, or documentation improvements.
* Apply critical thinking to emerging issues and adapt quickly to changing operational conditions.
* Provide informal mentoring to Engineers and Analysts on shift, acting as a technical role model.
What You Will Have
* Deep technical experience supporting Microsoft Windows Server environments and Azure-based infrastructure.
* Working knowledge of Microsoft 365 administration and integration.
* Experience with virtualization technologies (VMware/Hyper-V), storage platforms and backup tools.
* Strong troubleshooting skills across infrastructure platforms and multi-tenant environments.
* Familiarity with monitoring tools (e.g. LogicMonitor) and ITSM platforms (e.g. ServiceNow).
* Demonstrable knowledge of ITIL v4 processes including Incident, Problem, and Change Management.
* Strong communication skills and ability to convey complex technical detail clearly.
* Practical awareness of ISO27001, patching standards, and configuration control.
* A proactive approach, with the confidence to take ownership of incidents.
* Eligibility for UK Government Security Check (SC) clearance.
Desirable Skills And Experience
* Microsoft Certified: Azure Administrator Associate or equivalent.
* Experience contributing to major incident or service restoration activities.
* Exposure to automation or scripting (e.g. PowerShell).
* Understanding of networking fundamentals and perimeter security.
* Experience working in a shared services or MSP environment.
Additional Information
This is a shift-based role forming part of a 24x7 operations squad. Candidates must be willing and able to work a 24x7 pattern including nights, weekends, and public holidays.
What We Do For You
Wellbeing focused
* Annual Leave 26 days of annual leave, plus public holidays and the ability to buy additional days
* Employee Assistance Programme Free advice, support, and confidential counselling available 24/7 through Care First
Personal Growth
* Development Programmes From Future Managers to Leadership Training
* Performance Bonus Our Group-wide bonus scheme enables you to reap the rewards of your success
Financial wellbeing
* Pension Scheme Our plan with Scottish Widows offers 5% matched contribution by the company
* Income protection insurance Providing you with support and assistance when you need it most
Recognition
* Performance & Talent Our technology platform for real-time feedback, conversations and goals
Making a Difference
* MatchIt! Fundraise for a cause and OneAdvanced will match part of the funding
* Volunteering Time Our volunteering leave scheme allows you to use your time to help those in need
* Pennies from Heaven donate the pennies from your pay check to charity
Who We Are
OneAdvanced is one of the UK's largest providers of business software and services serving 20,000+ global customers. We invest in our brilliant people and strive to be a diverse, inclusive and engaging place to work that powers the world of work.
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