Senior Systems Administrator
Location: Kings Hill / Hybrid
Salary/package: £50,000 - £55,0000 per annum
Contract type: Permanent
Hours: Full time, 37 hours per week
As a Senior Systems Administrator at EIS, you will deliver and support complex solutions across Microsoft 365, Azure and hybrid infrastructure environments. From resolving third-line issues to implementing technical change, you will help ensure services remain secure, resilient and reliable.
You will work directly with customers and internal specialists, taking ownership of technical requirements and delivering practical solutions across a broad Microsoft technology estate.
Who we are
EIS, part of Commercial Services Group, is a leading digital services provider specialising in IT and digital transformation for the education and public sectors. We help organisations adapt and thrive through innovative technologies, deep sector expertise, and a commitment to reinvesting in frontline services.
Why this role matters
The Senior Systems Administrator will play a key role in ensuring cloud and hybrid technology services remain secure, available and aligned with customer requirements.
You will have responsibility for resolving complex issues, implementing change and delivering technical solutions across the Microsoft technology estate.
You will join a wider technical team that includes enterprise architecture, systems administration, technical delivery and contractor resource, giving you the opportunity to contribute to joined-up solutions across different areas of technical specialism.
What you’ll be doing
Managing and supporting Microsoft 365 tenant services, including Intune, Entra ID, SharePoint, OneDrive and Teams.
Delivering technical solutions across Azure, Microsoft 365 and on-premises environments.
Providing hands-on third-line support for complex infrastructure and application issues.
Planning and implementing technical changes, upgrades and new solutions.
Completing impact assessments and preparing implementation, testing and contingency plans.
Working directly with customers to understand technical requirements and expected outcomes.
Leading customer-facing technical discussions and contributing to workshops.
Investigating service failures using technical documentation, system information and event logs.
Working with third-party suppliers to identify, test and implement permanent resolutions.
Preparing low-level designs, change requests, procedures and technical work packages.
Supporting disaster recovery planning and the delivery of secure, resilient services.
Working closely with enterprise architects, technical delivery specialists and operational teams.
Supporting the transition of completed projects into BAU support.
Sharing technical knowledge and providing mentoring to other team members.
Contributing to the scheduled out-of-hours support rota
What we’re looking for
Proven experience in a Senior Systems Administrator, Senior Infrastructure Engineer or similar third-line technical role.
Strong hands-on experience managing Microsoft 365 tenant environments.
Strong knowledge of Intune, Entra ID, SharePoint, OneDrive and Microsoft Teams.
Good Azure cloud knowledge, with experience delivering solutions within an Azure environment.
Experience implementing and supporting hybrid cloud and on-premises infrastructure.
Strong knowledge of enterprise systems, Windows infrastructure and security operations.
Experience delivering complex Microsoft-based technical solutions.
Experience supporting identity management, multi-factor authentication and least-privilege access.
An understanding of Zero Trust principles within hybrid technology environments.
The ability to investigate complex technical issues and make evidence-based decisions.
Experience producing low-level designs and clear technical documentation.
Strong customer engagement and relationship-building skills.
The confidence to lead technical discussions and explain solutions to non-technical stakeholders.
Excellent planning, prioritisation and problem-solving skills.
A proactive and solutions-focused approach.
Relevant Microsoft or ITIL qualifications, or equivalent experience
What you’ll get in return
Salary of £50,000 to £55,000 per annum.
25 days annual leave, rising to 27 after four years service.
Birthday Day Off.
One concessionary day during the Christmas period.
Pension scheme with 6% employer contribution.
Life assurance cover.
Access to Learning & Development opportunities via our CSG Academy.
Hybrid working, with one day per week in Kings Hill and occasional travel
Why CSG?
CSG is the UK’s largest local authority-owned trading company (LATCO), generating over £700 million in revenue per annum and supporting more than 16,000 education and public sector customers globally.
We are growing through a combination of organic development, acquisitions and strategic partnerships. Our 35+ businesses deliver services across education, IT, HR, legal, energy, procurement and more, all focused on delivering meaningful impact.
As a locally owned organisation, we take pride in reinvesting a significant proportion of our profits into frontline services, helping strengthen the communities we serve.
Inclusion & Accessibility
We are committed to fostering a diverse and inclusive workplace where everyone feels valued and respected. We encourage applications from suitably qualified people of all backgrounds.
As a member of Inclusive Employers with Silver Accreditation, we are actively building an environment that supports inclusion, flexibility and belonging for all colleagues.
We are committed to providing reasonable adjustments throughout our application and interview process; please let us know if you require any.