Junior-mid Linux Systems Administrator – Trading systems

Company IconQuant Capital
Location IconLondon

Overview In this role you support mission-critical trading infrastructure, working within a fast-paced, entrepreneurial team. You’ll collaborate with sales and engineering to ensure reliable server and network operations for the firm’s...Read More>>.

Posted: October 1st, 2026
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Junior Systems Administrator – Quant trading

Company IconQuant Capital
Location IconLondon

Overview In this junior role, you will support the staff’s technology and user experience across Windows/Linux desktops, servers, and enterprise apps. You’ll contribute to automation-driven IT operations and rapidly grow your technical...Read More>>.

Posted: October 1st, 2026
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Senior IT Systems Administrator (Linux & HPC)

Company IconKBR
Location IconSurrey

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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Lead IT Network Administrator, Network, Voice, AV

Company IconKBR
Location IconLeatherhead

Overview In this role you lead the administration and optimization of complex Cisco-based networking, voice, and AV services across enterprise and secure environments. You will act as a technical escalation point for operations and projects...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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Systems Administrator / GitHub Enterprise

Company IconCognitive Group | Part of the Focus Cloud Group
Location Icon

Join a leading Microsoft partner – Digital, AI & Tech Transformation. Remote role but must be UK based and eligible for SC Clearance. No sponsorship can be offered. We are looking for a GitHub Enterprise Subject Matter Expert (SME)...Read More>>.

Posted: September 22nd, 2026
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Senior Network Administrator

Company IconKBR, Inc.
Location IconLeatherhead

Title: Senior Network Administrator 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-year history...Read More>>.

Posted: September 22nd, 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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Systems & Application Administrator

Company IconJ.W. Pepper & Son, Inc.
Location IconExton

Position Summary The Systems & Applications Administrator is responsible for the administration, maintenance, support, and continuous improvement of the organization's server infrastructure, enterprise technology platforms, and busines...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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Senior Research Systems Administrator

Company IconUniversity of Oxford
Location IconOxford

As Senior Research Systems Administrator, you will help develop, operate and continuously improve complex Linux-based research computing infrastructure, spanning established HPC and HTC platforms and emerging AI and GPU-enabled services. Your t...Read More>>.

Posted: September 22nd, 2026
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Senior Systems Administrator

Company IconVerve
Location IconSlough

Who We Are Verve is a global ad-tech company that owns and operates a fully integrated advertising stack, spanning demand, supply, and data. While most companies in our space specialize in one layer of the ecosystem, we own the DS...Read More>>.

Posted: September 22nd, 2026
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Systems & Applications Administrator: Infra, Apps & Security

Company IconJ.W. Pepper & Son, Inc.
Location IconExton

The Systems & Applications Administrator at J.W. Pepper & Son, Inc. is responsible for the administration, maintenance, support, and continuous improvement of the organization’s server infrastructure, enterprise platforms, and business applicati...Read More>>.

Posted: September 22nd, 2026
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System Administrator

Company IconPrism Digital
Location IconWindsor

Get AI-powered advice on this job and more exclusive features.This range is provided by Prism Digital. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.Base pay rangeDire...Read More>>.

Posted: September 22nd, 2026
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System Administrator - 1 year FTC (London or Amsterdam)

Company IconJAC Recruitment (UK) Ltd.
Location IconLondon

Company: Global Retail Company Position: Infrastructure Specialist Contract: 1-year fixed term contract Location: London (Hybrid) Salary: 60,000 – 70,000 GBP + 10% Bonus...Read More>>.

Posted: September 22nd, 2026
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Systems Administrator (Associate)

Company IconPowerToFly
Location IconBasingstoke

About Us Visa is a world leader in payments technology, facilitating transactions between consumers, merchants, financial institutions and government entities across more than 200 countries and territories, dedicated to uplifting every...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 System Administrator – DV Security Cleared

Company IconSalt Digital Recruitment
Location IconLondon

Applicants must hold active and valid Developed Vetting (DV) security clearance to be considered for this opportunity. Unfortunately, applications from candidates without current DV clearance cannot be progressed. An opportunity is available fo...Read More>>.

Posted: September 22nd, 2026
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Senior Research Systems Administrator — HPC & AI Infra

Company IconUniversity of Oxford
Location IconOxford

The University of Oxford is establishing OxRC, a new university-wide research computing service. As a Senior Research Systems Administrator, you will design, deploy and operate Linux-based infrastructure, spanning HPC/HTC platforms and GPU-enabled...Read More>>.

Posted: September 23rd, 2026
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Lead IT Network Administrator, Network, Voice, AV

Company IconKBR, Inc.
Location IconLeatherhead

Title:Lead IT Network Administrator, Network, Voice, AVKBR is seeking a Lead IT Network Administrator (Network, Voice & AV) to join our team supporting complex, mission critical IT infrastructure across enterprise and secur...Read More>>.

Posted: September 24th, 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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Security Systems Administrator I — TOC Operator & Analyst

Company IconM.C. Dean, Inc.
Location IconLondon

M.C. Dean, Inc. is hiring a System Administrator 1 for its Security and Electronic Systems (SES) unit.You will join a TOC team configuring and maintaining CCTV, access control, PSIM and related electronic security services for federal, loca...Read More>>.

Posted: September 26th, 2026
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System Administrator 1 - Technical Operations Center (Sunday shift)

Company IconM.C. Dean, Inc.
Location IconLondon

About M.C. Dean M.C. Dean is Building Intelligence®. We design, build, operate, and maintain cyber-physical solutions for the nation’s most mission-critical facilities, secure environments, complex infrastructure, and global enterpr...Read More>>.

Posted: September 26th, 2026
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Dev Ops Systems Administrator

Company IconProactive Appointments
Location IconPirbright

Senior DevOps Systems Administrator Location: Woking, Surrey - Hybrid (1 day per month in the office) Are you an experienced DevOps Systems Administrator or Senior DevOps Engineer ready to take ownership of complex...Read More>>.

Posted: September 27th, 2026
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Infor Systems Administrator

Company IconNigel Wright Group
Location IconNorth East

Our client is an international manufacturing organisation operating across multiple countries and production sites. The business is undertaking a major digital transformation programme, replacing a fragmented legacy systems landscape with a sin...Read More>>.

Posted: September 27th, 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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Systems Administrator - Platform Migration & Merge Specialist

Company Iconhawkeyeinnovations
Location IconBasingstoke

Systems Administrator - Platform Migration & Merge SpecialistLocation: Basingstoke (hybrid)Job Type: Fixed Term Contract (Until 31st March 2027)Salary: £50k - 80k (Pro Rated for period of hire Aug26-...Read More>>.

Posted: September 27th, 2026
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Senior Windows Systems Administrator — AD, Exchange & GPO Pro

Company IconGlobal Relay
Location IconLondon

Global Relay is seeking a Senior Windows Administrator to lead design, deployment, and support of Windows environments, focusing on Exchange, Active Directory, and desktop management. The role collaborates with Operations, Security, and IT teams t...Read More>>.

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

Company IconShieldai
Location IconLondon

Shield AI is seeking a highly autonomous Staff Systems Administrator to own enterprise IT infrastructure and end-user computing in a security-sensitive entity environment. You will design, implement, secure, and continuously improve on-premises sy...Read More>>.

Posted: September 28th, 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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Systems & Datacenter Administrator (Ops) — London

Company IconsmartTrade Group
Location IconLondon

smartTrade Technologies is a software publisher specializing in the trading and finance sector. Its clients primarily include investment banks, stock exchanges, brokers, and pension funds. smartTrade enables real-time computerized management of fi...Read More>>.

Posted: October 8th, 2026
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Systems & Datacenter Administrator (Ops) — London

Company IconsmartTrade Technologies
Location IconLondon

Role OverviewWe are seeking a hands-on Linux Systems & Datacenter Administrator to join our Europe Operations team. You’ll be the on‑the‑ground owner for our Slough (Equinix) environment and a key contributor to our global private c...Read More>>.

Posted: October 11th, 2026
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Remote Cloud Systems Administrator for AI & Research

Company IconJobgether SRL
Location Icon

Jobgether SRL, listed via a partner company, seeks a Systems Administrator to drive secure, reliable operation of cloud-hosted research apps and AI platforms in a fully remote UK environment.You'll manage cloud across GCP/AWS, containerized...Read More>>.

Posted: October 13th, 2026
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Systems Administrator - IT Infrastructure & Support (Research)

Company IconUniversity of Glasgow
Location IconGlasgow

University of Glasgow is seeking a Systems Administrator to support the SUERC IT infrastructure at the Glasgow site. The role focuses on servers, networks, storage, and collaboration tools to ensure reliable services for 90–100 staff. You will w...Read More>>.

Posted: October 2nd, 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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IT Systems & Compliance Administrator (ISO 27001)

Company IconCode Wizards
Location IconReading

Code Wizards is seeking an organised, proactive IT Systems and Compliance Administrator to maintain our internal IT infrastructure and support information security and compliance activities.You’ll work across on‑premises and cloud envir...Read More>>.

Posted: October 9th, 2026
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Remote CAFM Systems Administrator & Data Optimizer

Company IconPareto Facilities Management Ltd
Location Icon

Pareto Facilities Management Ltd is seeking an experienced CAFM Systems Administrator to own the day-to-day administration, maintenance and continuous improvement of CAFM systems, including simPRO and Infraspeak. You will support planned and react...Read More>>.

Posted: October 11th, 2026
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UK Remote PDM/PLM Systems Administrator — Autodesk Vault

Company Iconflextronics
Location Icon

Flex is seeking a UK-based remote PDM/PLM Systems Administrator to design, define, and implement system requirements for complex customer systems and new product introductions. You will administer Autodesk Vault, support SolidWorks PDM and PTC Win...Read More>>.

Posted: October 11th, 2026
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Estates Systems & Helpdesk Administrator

Company IconEast Lancashire Hospitals NHS Trust
Location IconLancashire

East Lancashire Hospitals NHS Trust is seeking an Estates System Support Worker to provide administrative and systems support to the Estates Services team across the organisation. You will handle the E&F Helpdesk, maintain estates databases, and i...Read More>>.

Posted: October 11th, 2026
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Systems and Data Administrator

Company IconStyle Acre
Location IconSouth Oxfordshire

Role:Systems and Data AdministratorLocation:OxfordshireSalary:£38.000 FTEHours:22.5 to 30 hours per weekContract:PermanentHelp us use technology to make a...Read More>>.

Posted: October 12th, 2026
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Remote System Administrator – Control Room

Company IconQiNet S.p.A. Impresoft 4ward
Location IconFull Sutton

Impresoft 4ward cerca un System Administrator per la Control Room, con focus su trouble shooting I e II livello e supporto reattivo/proattivo. Il ruolo si svolge con lavoro da remoto e turnazioni H24, in collaborazione con i clienti nazionali ed i...Read More>>.

Posted: October 13th, 2026
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