1 to 25 of 41 Systems Administrator Jobs in London

Systems Administrator - London - ITSA IT Systems Administrator About the Role We are seeking an experienced and proactive IT Systems Administrator to join our IT Department. The successful candidate will be responsible for administering, maintaining, and improving the Company’s office … server environments and enterprise services. Manage users, permissions and security groups. Administer Hyper-V virtual infrastructure. Manage backups. Monitor performance, availability and reliability. Ensure systems remain secure through patch management. Perform server maintenance and upgrades. Troubleshoot and resolve complex infrastructure issues. Participate in infrastructure implementation and upgrade projects. Maintain ...

Network Systems Administrator/IT Infrastructure Support Engineer - Windows Server, Active Directory, Group Policy, Microsoft 365, Hyper-V, LAN/WAN, Wi-Fi, VPN, SQL Server, Sage. Permanent. South East London/Hybrid 3/2. c£40k +Benefits Established SME operating within the music publishing sector … seeks an experienced Network Systems Administrator/IT Infrastructure Support Engineer (“IT Manager”) to take hands-on responsibility for the technology environment supporting its London and New York offices. This is a broad individual contributor role covering Desktop Support, Windows Server, Networks, Microsoft 365, Virtualisation and Business ...

Network Systems Administrator/IT Infrastructure Support Engineer - Windows Server, Active Directory, Group Policy, Microsoft 365, Hyper-V, LAN/WAN, Wi-Fi, VPN, SQL Server, Sage. Permanent. South East London/Hybrid 3/2. c£40k +Benefits Established SME operating within the music publishing sector … seeks an experienced Network Systems Administrator/IT Infrastructure Support Engineer ("IT Manager") click apply for full job details ...

Linux Systems Administrator London We're looking for a Linux Systems Administrator to join our technology team and help support, maintain and enhance a modern Linux and cloud-based infrastructure environment. This role would suit someone with hands-on Linux administration experience … looking to further develop their cloud, automation and infrastructure engineering skills while working alongside experienced engineers. Responsibilities Administer and support Linux-based systems and infrastructure Monitor system performance and troubleshoot technical issues Support cloud-hosted environments and infrastructure projects Assist with infrastructure automation and Scripting activities Work closely with ...

Title Systems Administrator – Identity Specialist Reports to Mohammed Bulbulia Closing Date 22/Oct/2026 23.59 GMT About us The Francis Crick Institute is Europe’s largest biomedical research institute under one roof. Our world-class scientists and staff collaborate on vital research to help prevent … boundaries helps us to turn our science into benefits for human health and the economy. About the role We are recruiting for an exceptional Systems Administrator - Identity Specialist to play a pivotal role within our Infrastructure and Cloud Platforms team. The Infrastructure and Cloud Platforms team ...

Ensure smooth IT operations by managing servers, networks, and cloud infrastructure. Job Description We are seeking a Systems Administrator to ensure the stability, security, and scalability of our IT infrastructure. You will manage a mix of on-premise servers, cloud platforms, and enterprise applications to keep business … operations running smoothly. Your role will involve proactive monitoring, troubleshooting, and optimizing systems performance. Collaboration is key in this role. You will work alongside the IT and engineering teams to implement new technologies, streamline workflows, and strengthen system resilience. From deploying updates to managing user accounts and access controls ...

fast-growing global firm is seeking an experienced Systems Administrator to join the team in Central London. The business embraces flexibility so you will be able to work from home 2 days per week. In this brand-new role, you will … function for the UK and Europe office. You will act as a trusted expert for IT requests in this hands‐on position covering IT systems, devices, security, SaaS and office technology. You will troubleshoot and resolve technical issues, administer Google Workspace and Slack, and manage a fleet ...

fast-growing global firm is seeking an experienced Systems Administrator to join the team in Central London. The business embraces flexibility so you will be able to work from home 2 days per week. In this brand-new role, you will … function for the UK and Europe office. You will act as a trusted expert for IT requests in this hands-on position covering IT systems, devices, security, SaaS and office technology. You will troubleshoot and resolve technical issues, administer Google Workspace and Slack, and manage a fleet ...

just getting started. Role Overview Harvey is building a best-in-class go-to-market engine, and we're looking for a GTM Systems Administrator to join the GTM Systems team and help scale the systems that power both our pipeline and our customer experience. … traditional RevOps or Salesforce admin role: we expect this person to work AI-first, using AI tools and agents to build, automate, and maintain systems that would traditionally require engineering support or manual admin work. Reporting to the Head of GTM Systems, you'll partner closely with Sales ...

Harvey is seeking a GTM Systems Administrator to join the GTM Systems team and scale systems powering pipeline and customer experience. You’ll work AI-first on projects from lead sourcing to customer success tooling, reporting to the Head of GTM Systems and partnering ...

more information, visit www.shield.ai. Follow Shield AI on LinkedIn, X, Instagram, and YouTube. Job Description: 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 individual contributor will design, implement, operate, secure, and continuously improve on-premises systems, cloud platforms, identity services, networks, and endpoints while preserving required legal, operational, information-security, and access boundaries. The role combines deep infrastructure ownership with hands-on service delivery. The successful candidate will translate security ...

quality of experiences and investing in a collaborative culture where all can thrive. About the Role We are recruiting a Microsoft 365 & Systems Administrator to join our IT Infrastructure & Security team. The role is focused primarily on the administration and support of our Microsoft cloud and endpoint … remote each week, and on call (evenings and weekends) 1 week in every 4. About You Essential Experience Demonstrable experience in a systems administration, Microsoft 365, endpoint management or advanced IT support role. Hands-on systems administration experience within a predominantly Microsoft environment. Strong hands-on experience administering ...

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 availability, security, and reliability. You will manage Windows Server environments ...

technology actively supports operations worldwide. For more information, visit www.shield.ai. Follow Shield AI on LinkedIn, X, Instagram, and YouTube. Job Description: The Systems Administrator is responsible for supporting, securing, and optimizing enterprise IT operations. This includes end-user system support, infrastructure maintenance, IT asset lifecycle management … discipline, and a collaborative mindset to support a modern, scalable, and secure IT environment. What you'll do: Provide hands-on desktop, server, and systems administration support for Windows and Linux environments. Install, configure, and troubleshoot hardware and software issues across end-user devices and server systems. Administer user ...

Zollaro, Inc. is seeking a Systems Administrator to ensure the stability, security, and scalability of its IT infrastructure. You will manage a mix of on‐premise servers, cloud platforms, and enterprise applications to keep business operations running smoothly. Proactive monitoring, troubleshooting, and optimization will be core responsibilities. ...

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 with SOC and cross‐functional teams to ensure secure, scalable access ...

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 stack fit for purpose as the business scales. ...

fast-growing global firm is seeking an experienced Systems Administrator to join the team in Central London. The business embraces flexibility so you will be able to work from home 2 days per week. In this brand-new role, you will … function for the UK and Europe office. You will act as a trusted expert for IT requests in this hands-on position covering IT systems, devices, se click apply for full job details ...

looking to double the size of their business over the coming 12 months.As part of their growth they are looking for a Systems Administrator to manage their entire Infrastructure Operations from User Configuration to Continuous Integration. The position requires someone with an entrepreneurial mentality, who thrives ...

flow of knowledge and ideas between all areas of the firm. About the Role We are seeking a hands-on professional for our growing systems administration team. Systems Administrators are responsible for the workstations and servers of our rapidly expanding trading operations. In addition to all systems work both on the desktops and in the datacenters, Five Rings Systems Administrators frequently interact with users at various levels all across our organization. We are a Linux shop both on the server side and the trader desktops. Our firm runs Windows servers very rarely and Windows desktops ...

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 requirements and cross-team collaboration on DevOps CI/ ...

real industrial environments - and we’re growing the team to take it even further. About the Role We are looking for an IT Systems Administrator , who is also a genuine Atlassian specialist. You will be the go-to expert for Jira and the wider Atlassian suite, owning … understanding of Jira admin concepts: project configuration, permission and notification schemes, JQL, global vs project-level administration Experience in a general IT, helpdesk or systems administration role Working knowledge of identity and access management (e.g. Entra ID, Okta, Google Workspace) and SSO concepts Strong troubleshooting skills and the ability ...

Are you curious, motivated, and forward-thinking? At FIS you’ll have the opportunity to work on some of the most challenging and relevant issues in financial services and technology. Our talented people empower us ...

Job Description I'm recruiting for a Linux System Administratorto join a large organisation in London on a permanent basis. The role is in a technical lead capacity andis 100% hands-on so in-depth ...

Experience Required: Fresher Job Type: Full-time Department: IT Consulting & Digital Automation Position Summary: At Acensys , we are seeking a proactive, innovative, and technically driven individual to join our team as a Junior Workfront Consultant ...