Senior IT Systems Administrator (Linux & HPC)

Company IconKBR
Location IconLeatherhead

Overview In this role you will own the Linux and HPC platform stack, delivering secure, reliable enterprise and research-computing environments. You will manage Linux systems, HPC clusters, and workload scheduling while ensuring performance...Read More>>.

Posted: October 1st, 2026
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Systems Administration Team Lead – Quant Trading

Company IconQuant Capital
Location IconLondon

Overview In this role you lead the IT Helpdesk and Systems Administration for a renowned systematic hedge fund, supporting Europe and Asia-Pacific offices. You will oversee a high-tech Windows and Linux environment, storage and clustered co...Read More>>.

Posted: October 1st, 2026
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D365 Systems Administrator: Finance & Integrations Lead

Company IconFormula 1
Location IconCity of Westminster

Formula 1 is seeking a D365 Systems Administrator to join our IT department. You will maintain and optimise the D365 Finance & Operations environment and integrated systems in line with F1 business goals. You will configure and support D365, build...Read More>>.

Posted: September 22nd, 2026
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System Administrator II — Security & Access Control

Company IconM.C. Dean, Inc.
Location IconLondon

M.C. Dean in the United Kingdom is seeking a System Administrator 2 to join the Security and Electronic Systems (SES) unit. You will configure and maintain Physical Access Control, CCTV, PSIM, and other electronic security systems for client sites...Read More>>.

Posted: September 22nd, 2026
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Senior Systems Administrator – Cloud, Identity & Endpoints

Company IconAbtrace Ltd.
Location IconLondon

Abtrace Ltd. is seeking a Systems Administrator to own our internal infrastructure, identity and endpoint estate in a hands-on role within a small team. You will manage AWS, Microsoft 365, Entra ID and device management across Windows and macOS, e...Read More>>.

Posted: September 22nd, 2026
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IT Systems Administrator — Flexible, 24x7 Support

Company IconSideglobal
Location IconLondon

Side is seeking an IT Systems Administrator to join its global IT Support team in London. You will maintain corporate servers, network infrastructure, and desktops (Windows, Mac, Linux) and manage Active Directory, Office 365, Intune, and security...Read More>>.

Posted: September 22nd, 2026
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Senior Systems Administrator – AWS & Identity (Hybrid)

Company IconAbtrace
Location IconLondon

Abtrace is seeking a Systems Administrator to own internal infrastructure, identity and endpoint estate. You will manage AWS, Microsoft 365, Intune and hybrid work practices in a small team, handling support tickets and security/compliance in a NH...Read More>>.

Posted: September 22nd, 2026
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Senior IT Systems Administrator (Linux & HPC)

Company IconKBR, Inc.
Location IconLeatherhead

Title: Senior IT Systems Administrator (Linux & HPC) KBR is a global provider of differentiated, professional services and technologies delivered across a wide government, defense and industrial base. Drawing from its rich 100-y...Read More>>.

Posted: September 22nd, 2026
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Senior Linux & HPC Systems Administrator (Hybrid)

Company IconKBR, Inc.
Location IconLeatherhead

KBR, Inc. is seeking a Senior IT Systems Administrator (Linux & HPC) to own the Linux enterprise and HPC platforms. The role focuses on Linux engineering, HPC compute, SLURM workload management, and cluster provisioning with NVIDIA Base Command Ma...Read More>>.

Posted: September 24th, 2026
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DV-Cleared Senior Linux Systems Administrator

Company IconSalt Digital Recruitment
Location IconLondon

Salt Digital Recruitment is seeking a DV-cleared Senior Linux System Administrator to join a security-focused team supporting a large-scale UK national infrastructure big data platform. The role emphasizes on-site delivery with strict DV clearance...Read More>>.

Posted: September 24th, 2026
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Global Infor ERP Systems Administrator – Transformation

Company IconNigel Wright Group
Location IconNorth East

Nigel Wright Group is seeking a Global Infor Systems Administrator to own the operational management, administration and continuous improvement of the organisation’s global Infor environment.Joining during the latter stages of implementat...Read More>>.

Posted: September 27th, 2026
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Senior Systems Administrator - Enterprise IT & Security

Company IconTelemetry Today LLC
Location IconLondon

Shield AI is seeking a highly autonomous Staff Systems Administrator to serve as the accountable technical owner for enterprise IT infrastructure and end-user computing within a dedicated, security-sensitive entity environment.This senior i...Read More>>.

Posted: September 27th, 2026
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ServiceNow System Administrator - Platform & Integrations Expert

Company IconWavenet
Location Icon

Wavenet is seeking a proactive ServiceNow System Administrator to manage and enhance our ServiceNow platform. You’ll ensure stability, usability, and ongoing improvements across ITSM, CSM, and related modules, collaborating with the Platform Own...Read More>>.

Posted: September 30th, 2026
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Senior Systems Administrator - Healthcare Cloud & Security

Company IconAbtrace Limited
Location IconLondon

Abtrace Limited in London is seeking a Systems Administrator to own our internal infrastructure, identity and endpoint estate, and to keep the internal support pipeline moving. This hands-on role covers AWS, Microsoft 365, Intune, Jamf/Kandji, and...Read More>>.

Posted: October 1st, 2026
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Hybrid Systems Administrator – Identity & Email Specialist

Company IconHuge
Location Icon

Huge is seeking a seasoned Systems Administrator to join our global team as the US-based member. You will own day-to-day health of identity, email security, device management, and office networking while collaborating with teams across the America...Read More>>.

Posted: October 5th, 2026
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Senior Systems Administrator — Windows & Linux Lead

Company IconShield
Location IconLondon

Shield AI is seeking a Systems Administrator to support, secure, and optimize enterprise IT operations across Windows and Linux environments. You will manage end-user support, infrastructure maintenance, asset lifecycle processes, and mentor junio...Read More>>.

Posted: October 7th, 2026
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Identity & Systems Administrator — IAM & Cloud Specialist

Company IconFrancis Crick Institute Ltd
Location IconLondon

The Francis Crick Institute Ltd in London is seeking a Systems Administrator – Identity Specialist to lead IAM initiatives across on‑prem and cloud services. You will drive identity platforms (AD/Okta), manage DSAR workflows, and collaborate w...Read More>>.

Posted: October 11th, 2026
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Senior IT Systems Administrator – Hybrid, London

Company IconThis is Beyond Ltd
Location IconLondon

Forge is seeking a Senior Systems Administrator to own and modernize our UK IT environment from Shepherd’s Bush, London. The role is hybrid, four days onsite with a Friday work-from-home option, reporting into Forge IT but based in the This is B...Read More>>.

Posted: October 12th, 2026
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Laboratory Systems Administrator – Geotech Data & Workflows

Company IconFugro
Location IconWallingford

Fugro Wallingford seeks a Laboratory Software System Administrator to maintain geotechnical testing data, sample tracking and reporting workflows across the laboratory environment. You will help optimise operations and support project delivery for...Read More>>.

Posted: October 14th, 2026
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Entry-Level Systems Administrator — IT Support & Security

Company IconCACI International Inc
Location IconSwindon

CACI International Inc in Swindon is seeking a Junior Systems Administrator to support the GMOS contract for the Department of State, contributing to national security through reliable IT services. In this role you will log and triage tickets, ass...Read More>>.

Posted: October 22nd, 2026
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OT & IT Systems Administrator: Linux, Cloud & Security

Company IconNoriker Power Ltd
Location IconCheltenham

Noriker Power Ltd is seeking a skilled IT Systems Administrator to maintain and improve the organisation's OT and Enterprise IT infrastructure. You will support Linux servers, Google Workspace, and cloud services while ensuring security and perfor...Read More>>.

Posted: October 3rd, 2026
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Salesforce System Administrator — Elevate a Critical Platform

Company IconNHS Professionals
Location IconLeeds

NHS Professionals is seeking a Salesforce System Administrator to join our Salesforce Centre of Excellence in Leeds. You will administer and optimise the Salesforce platform, support users, manage security and data quality, and collaborate with bu...Read More>>.

Posted: October 4th, 2026
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IT Systems Administrator - Grow with Microsoft IT Projects

Company IconNextech Group
Location IconNorthampton

Nextech Group is seeking an IT Systems Administrator in Northampton to join an established IT consultancy. You will provide IT support to internal users and remote clients, manage patching, deploy laptops, and support Microsoft 365, Windows Server...Read More>>.

Posted: October 5th, 2026
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Dynamics 365 BC — Production Systems Administrator

Company IconRobinsons Brewery
Location IconStockport

Robinsons Brewery is seeking a Production Systems Administrator to join the Production team and support bottling and planning operations through effective use of Microsoft Business Central.You will be the go-to person for Business Central w...Read More>>.

Posted: October 7th, 2026
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Hybrid People Systems Administrator iTrent Expert

Company IconRHS Chelsea Flower Show Peter Beales Roses Limited
Location IconOckham

RHS Garden Wisley is seeking a People Systems Administrator to develop and administer our People Systems, ensuring data accuracy and delivering effective reporting and user support. The role is hybrid, blending Wisley on-site work with home-based...Read More>>.

Posted: October 8th, 2026
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Identity IAM Systems Administrator | Hybrid, London

Company IconCrick
Location IconLondon

The Francis Crick Institute in London seeks a Systems Administrator – Identity Specialist to lead identity services, DSAR handling, and security improvements within the Infrastructure and Cloud Platforms team. The role combines technical leaders...Read More>>.

Posted: October 11th, 2026
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Senior IT Systems Administrator - Hybrid, Secure & Automate

Company IconTwinstream Limited
Location IconGloucester

TwinStream is seeking a Senior IT Systems Administrator to own and secure our corporate IT estate across cloud and on‑premise services. This hands‑on role offers autonomy to drive improvements, automate tasks and mentor colleagues.You w...Read More>>.

Posted: October 12th, 2026
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Hybrid IT Systems Administrator — Cloud & Infrastructure Lead

Company IconSanderson
Location IconOswestry

Practice Plan, part of the Wesleyan Group, is hiring an experienced Systems Administrator to support and improve our infrastructure across the UK. You will lead projects, troubleshoot complex issues and help ensure secure, reliable technology for...Read More>>.

Posted: October 13th, 2026
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Systems Administrator - AWS, Linux & Automation (Hybrid)

Company IconTicket
Location IconSwindon

Edenred PayTech is hiring a Systems Administrator in Swindon for hybrid work. You will manage AWS and Linux-based platforms, patch servers, and implement infrastructure automation with Git, Terraform and Ansible.The role emphasizes security...Read More>>.

Posted: October 16th, 2026
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Senior IT Systems Administrator (DV Clearance Eligible)

Company IconTwinStream Limited
Location Icon

TwinStream Limited is seeking a Senior IT Systems Administrator to take senior operational responsibility for the performance, resilience, maintenance and improvement of IT systems and services. You will work within the IT team to implement change...Read More>>.

Posted: October 17th, 2026
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IT Systems Administrator - Cloud, Security & Automation

Company IconTTP
Location IconCambridge

Cellular Origins is hiring an IT Administrator to partner with the Head of IT and design, run and improve our technology stack. You’ll own a growing set of Microsoft 365 services, manage Windows devices with Intune, and help migrate and maintain...Read More>>.

Posted: October 17th, 2026
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HR Systems Administrator: SuccessFactors & Data Insights (Hybrid)

Company IconJet2.com and Jet2holidays
Location IconLeeds

Jet2.com and Jet2holidays is seeking an HR Systems Administrator to manage our HR systems, maintain accurate people data, produce meaningful reporting and provide first-class support to colleagues across the business.You'll be the first poi...Read More>>.

Posted: October 17th, 2026
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Automation-Driven IT Systems Administrator (Power Platform)

Company IconRise Technical Recruitment Ltd
Location IconRoss on Wye

Rise Technical Recruitment Ltd is seeking an IT Systems Administrator in Ross-on-Wye to drive automation projects using Power Apps, Power Automate, SharePoint and Power BI while maintaining hands-on responsibility for modern workplace technologies...Read More>>.

Posted: October 18th, 2026
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Senior Systems Administrator - Windows/Linux, IAM & On-Call

Company IconShield
Location IconLondon

Shield AI seeks a Systems Administrator to support, secure, and optimize enterprise IT operations across Windows and Linux environments. The role includes hands-on administration, asset lifecycle management, and mentoring junior staff in a modern,...Read More>>.

Posted: October 21st, 2026
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Site Systems Co-ordinator / Site Systems Administrator

Company IconDalkia Energy Services Ltd
Location IconBridgwater

About Dalkia UKAt Dalkia, we're driven by a shared purpose: tackling climate change and building a better, more sustainable future. We bring together talented people who share knowledge, challenge each other and grow together.Ba...Read More>>.

Posted: October 22nd, 2026
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Cloud Systems Administrator – Scale-Up Startup Role

Company IconML Digitech
Location IconLondon

ML Digitech is seeking a Systems Administrator in Greater London to own the infrastructure from user configuration to CI. You will thrive in a startup environment, handling ad-hoc duties across Operations and Development to keep the client’s sta...Read More>>.

Posted: October 22nd, 2026
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Senior IT Systems Administrator - Ship & Office Infra

Company IconLomar Shipping Limited
Location IconLondon

Lomar Shipping Limited is seeking an experienced IT Systems Administrator to join our IT Department in London. You will be responsible for administering, maintaining, and improving the company’s office and vessel IT infrastructure to ensure high...Read More>>.

Posted: October 22nd, 2026
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Systems Administrator M365 Intune Euston NW1 £50k

Company IconLangley James HR & IT Recruitment
Location IconLondon

Systems Administrator M365 Intune Euston NW1, Hybrid upto £50k. Seeking a talented Systems Administrator with strong M365 and Intune experience to join a great creative tech firm near Euston Station. Are you a skilled Systems Adm...Read More>>.

Posted: October 22nd, 2026
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Senior IT Systems Administrator — Cloud & Security Lead

Company IconTwinStream Limited
Location Icon

TwinStream is seeking a Senior IT Systems Administrator to take senior operational responsibility for the performance and resilience of our IT systems as the business grows.Working under the IT Technical Lead, you will lead complex deployme...Read More>>.

Posted: October 22nd, 2026
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Hybrid IT Systems Administrator & Senior Support Lead

Company IconSoCode Limited
Location IconCambridge

SoCode Limited in Cambridge is seeking a Systems Administrator to manage and support a hybrid IT environment spanning on‑premise and cloud services. You will mentor junior staff, act as a senior escalation point and contribute to continual impro...Read More>>.

Posted: October 22nd, 2026
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Systems Administrator / Information Services / Full Time / Days

Company IconWood County Hospital
Location IconEast Midlands

Elevate your career at Wood County Hospital, where you’re not just a number – you’re a vital part of a team making a real difference. Systems Administrator / Information Services / Full Time / Days The Systems Administrator...Read More>>.

Posted: October 22nd, 2026
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Systems Administrator – SC/DV Clearance for Spacecraft Ops

Company IconAirbus
Location IconCorsham

Airbus Defence and Space Limited in the UK seeks a System Administrator to support the Spacecraft Control Centre (SCOF) across Wiltshire. You will install, configure and maintain SCC computer systems, lead deployment plans, and develop robust test...Read More>>.

Posted: October 22nd, 2026
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Systems Administrator - Security-Cleared (Hybrid UNIX/Linux)

Company IconAirbus Defence and Space
Location IconChippenham

Airbus Defence and Space is seeking a System Administrator to join their Spacecraft Control Centre Support Team in Chippenham. This role involves the installation and maintenance of systems critical for command and control of spacecraft.The...Read More>>.

Posted: October 22nd, 2026
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IT Support Engineer: Path to Systems Administrator (Hybrid)

Company IconAbtrace Ltd.
Location IconLondon

Abtrace Ltd. in London is seeking an IT Support Engineer to own internal IT across the company, supporting users and managing access, devices, and day-to-day troubleshooting.The role is hands-on within a small team, with a clear path toward...Read More>>.

Posted: October 22nd, 2026
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Senior IT Systems Administrator – Hybrid Cloud & Security

Company IconSoCode Limited
Location Icon

SoCode Limited in Cambridge is seeking a Systems Administrator to manage a hybrid IT environment spanning on-premise and cloud services. You will work with infrastructure colleagues, support technicians and stakeholders to keep systems secure, res...Read More>>.

Posted: October 22nd, 2026
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Healthcare IT Systems Administrator: Transform Patient Care

Company IconNHS Jobs
Location IconLeeds

Leeds Teaching Hospital NHS Trust is seeking a Digital System Administrator to support and enhance clinical and IT systems, driving improvements in patient care through digital solutions. You will work with clinicians and technical teams to manage...Read More>>.

Posted: October 22nd, 2026
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HRIS & People Systems Administrator | Data-Driven HR

Company IconAnother Recruitment Ltd
Location Icon

Another Recruitment Ltd is recruiting for a People Systems Administrator in York, North Yorkshire. The role involves being the first point of contact for HR system queries, maintaining HR data, and supporting system configurations and upgrades....Read More>>.

Posted: October 22nd, 2026
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Hybrid HR & Systems Administrator - Data-Driven Support

Company IconDelta Housing
Location IconChelmsford

Delta Housing is seeking an HR & Systems Administrator in Chelmsford for a up to 14 month FTC. The role is full-time and starts in the office for training, then moves to hybrid working with two days on site per week and flexible coverage possibili...Read More>>.

Posted: October 22nd, 2026
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