17 of 17 Senior Systems Administrator Jobs in London

NEW FTC ROLE – SENIOR IT SYSTEMS ADMINISTRATOR (WINDOWS) Southeast England | Hybrid (40% on-site) 6 month FTC | Salary TBC Full-Time | Interviews via Teams/On-site A leading institution in the Southeast is seeking a Senior IT Systems Administrator to join its dynamic and collaborative IT infrastructure … For: Strong experience administering Microsoft 365 , Exchange/Exchange Online , and Windows Server Solid understanding of Active Directory and Azure AD Proven ability to manage backup and disaster recovery systems Hands-on knowledge of patching processes and systems Familiarity with the ITIL framework and service desk environments Experience in the public sector or higher education is desirable, but More ❯

Hosting Service - Senior System Administrator Hosting Service - Senior System Administrator 1 week ago Be among the first 25 applicants Get AI-powered advice on this job and more exclusive features. Direct message the job poster from Idox plc Home based with occasional travel to Idox offices. About the role We … are seeking a skilled Senior System Administrator to support and enhance our hosted solutions across both private and public cloud environments. This role is essential in ensuring the availability, security, performance and compliance of hosted services against our published service levels and descriptions. The ideal candidate will bring deep expertise in managing complex IT environments … Industries IT Services and IT Consulting, Software Development, and IT System Data Services Referrals increase your chances of interviewing at Idox plc by 2x Get notified about new System Administrator jobs in England, United Kingdom . Oxford, England, United Kingdom 1 day ago Abingdon-On-Thames, England, United Kingdom 6 hours ago London, England, United Kingdom 2 weeks More ❯

Social network you want to login/join with: Hosting Service - Senior System Administrator, england col-narrow-left Client: Idox plc Location: england, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Views: 2 Posted: 10.06.2025 Expiry Date: 25.07.2025 col-wide Job Description: Hosting Senior System Administrator Public Sector Hosting Home based with occasional travel to Idox offices. About the role We are seeking a skilled Senior System Administrator to support and enhance our hosted solutions across both private and public cloud environments. This role is essential in ensuring the availability, security, performance and compliance of hosted services against our … hosted services in order to meet SLAs. Implement redundancy, disaster recovery, and failover mechanisms to minimize downtime. Deploy and maintain monitoring solutions for both private and public cloud-hosted systems to identify and resolve issues proactively. Analyse performance metrics and implement optimizations to ensure alignment with SLA requirements. Manage and maintain Citrix NetScaler for load balancing, secure access, and More ❯

Exchange (EXPN), we employ 22,500 people across 32 countries, with our headquarters in Dublin, Ireland. Learn more at Job Description We are seeking a Senior Systems Administrator to support and diagnose incidents within the Colleague Technology Support group, adhering to established service levels. The role covers server, desktop, laptop, mobile device support, domain More ❯

Social network you want to login/join with: Senior Linux System Engineer/Administrator - Trading, London Client: East End Resources Location: London, United Kingdom Job Category: Other EU work permit required: Yes Job Views: 3 Posted: 08.05.2025 Expiry Date: 22.06.2025 Job Description: Our client is a mid-size financial services firm which is a … strictly necessary. We interact directly with users and communicate frequently, so good communication skills are important. About the Role We are seeking a hands-on professional for our growing systems administration team. Systems Administrators are responsible for workstations and servers in our expanding trading operations. This role involves working on desktops and data centers, with frequent interaction across More ❯

Linux System Administrator Our client is a mid-size financial services firm which is a L inux shop both on the server side and the trader desktops. Client has multiple locations - the London office is smail and you will be the single Linux administrator. Some Windows administration skills are a plus but not strictly … necessary. We face our users directly and interact with them frequently. Good communication skills are important. 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, Systems Administrators frequently interact with users at various levels all across our organization. Skills & Attributes: Fluency in Linux administration is a must Experience in Debian/Ubuntu preferred Strong communication skills A demonstrated ability to work tasks to completion and tolerate frequent context switches Experience scripting in bash and python is preferred, SQL and Perl More ❯

Linux System Administrator Our client is a mid-size financial services firm which is a L inux shop both on the server side and the trader desktops. Client has multiple locations - the London office is smail and you will be the single Linux administrator. Some Windows administration skills are a plus but not strictly … necessary. We face our users directly and interact with them frequently. Good communication skills are important. 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, Systems Administrators frequently interact with users at various levels all across our organization. Skills & Attributes: Fluency in Linux administration is a must Experience in Debian/Ubuntu preferred Strong communication skills A demonstrated ability to work tasks to completion and tolerate frequent context switches Experience scripting in bash and python is preferred, SQL and Perl More ❯

and willing to take on any challenge. Enjoy working with customers of all shapes and sizes. You will have a passion for educating, training, designing, and building cloud computing systems for a diverse and challenging set of customers. Have a strong understanding of large scale cloud computing solutions. The ideal candidate will have past experience working as a security … systems engineer or security architect. You will enjoy keeping your existing technical skills and developing new ones, so that you can make strong contributions to deep architecture discussions around securing systems and applications in the cloud. You regularly take part in deep-dive education and design exercises along with technical deep dive drive technical discussions to create world … presentation skills – Presentations, white boarding, large and small group speaking. Technical – broad and deep knowledge of fundamental security principles and technologies, Security services development/deployment experience, and IT systems and network engineering experience. Operational Security – should have experience in operationalizing both infrastructure and application security controls Economic and business – RFP/Acquisition support; market analysis; cost benefit analysis More ❯

Join to apply for the Senior Salesforce System Administrator role at Wellcome Trust Join to apply for the Senior Salesforce System Administrator role at Wellcome Trust Direct message the job poster from Wellcome Trust Contract type: Permanent The Wellcome Trust is a global charitable foundation. We improve health for everyone … health. These challenges need the bold science we support, but they won’t be solved by science alone. We are looking for a Senior Salesforce System Administrator to join our Funding Operations and Governance team in Research Funding on a permanent position. Where in Wellcome will I be working? Wellcome is seeking an experienced Senior … you will work closely with the Strategic and Technical Leads for the platform, and the Product Manager. What will I be doing? The Senior Salesforce System Administrator plays a critical and varied role in managing and optimising the Salesforce platform across Wellcome and data to meet organisational needs. As a Senior Salesforce More ❯

Hosting Service – Senior Systems Administrator, UK We are seeking a skilled Senior System Administrator to support and enhance our hosted solutions across both private and public cloud environments. This role is essential in ensuring the availability, security, performance and compliance of hosted services against our published service levels and More ❯

exciting project. You’ll be joining a small, highly skilled team working on a large-scale, embedded server platform — built on Ubuntu, running on real hardware, and powering production systems used by thousands. This isn’t a role buried in abstraction — you’ll be close to the metal, solving real problems with real consequences. What You’ll Do Maintain … and optimise Ubuntu-based Linux systems running in a private cloud environment. Monitor, troubleshoot, and improve performance across systems and services. Manage production databases (PostgreSQL, Cassandra, Redis, Kafka) with a focus on reliability and scalability. Work on network infrastructure — including WireGuard tunnels, BGP configuration, and general network troubleshooting. Contribute to internal tooling (AMIs, automation, monitoring) and help shape … projects. Occasionally provide out-of-hours support as part of a shared rotation ( All within normal working hours Monday - Friday) What We’re Looking For Deep experience running Linux systems in production — especially Ubuntu. Confidence in managing, tuning, and troubleshooting relational and distributed databases. Strong understanding of networking concepts — experience with VPNs, routing, and security best practices. Comfortable working More ❯

Manage Kubernetes clusters and containerized workloads. Administer GitLab infrastructure for CI/CD processes. Operate and maintain Kafka clusters for real-time data pipelines. Diagnose and resolve issues across systems, networks, containers, and applications. Use observability tools (Grafana, Prometheus, Kibana, Elasticsearch) to monitor system health. Automate system management tasks using Ansible. Participate in an on-call rotation to support More ❯

Manage Kubernetes clusters and containerized workloads. Administer GitLab infrastructure for CI/CD processes. Operate and maintain Kafka clusters for real-time data pipelines. Diagnose and resolve issues across systems, networks, containers, and applications. Use observability tools (Grafana, Prometheus, Kibana, Elasticsearch) to monitor system health. Automate system management tasks using Ansible. Participate in an on-call rotation to support More ❯

Manage Kubernetes clusters and containerized workloads. Administer GitLab infrastructure for CI/CD processes. Operate and maintain Kafka clusters for real-time data pipelines. Diagnose and resolve issues across systems, networks, containers, and applications. Use observability tools (Grafana, Prometheus, Kibana, Elasticsearch) to monitor system health. Automate system management tasks using Ansible. Participate in an on-call rotation to support More ❯

Manage Kubernetes clusters and containerized workloads. Administer GitLab infrastructure for CI/CD processes. Operate and maintain Kafka clusters for real-time data pipelines. Diagnose and resolve issues across systems, networks, containers, and applications. Use observability tools (Grafana, Prometheus, Kibana, Elasticsearch) to monitor system health. Automate system management tasks using Ansible. Participate in an on-call rotation to support More ❯

Manage Kubernetes clusters and containerized workloads. Administer GitLab infrastructure for CI/CD processes. Operate and maintain Kafka clusters for real-time data pipelines. Diagnose and resolve issues across systems, networks, containers, and applications. Use observability tools (Grafana, Prometheus, Kibana, Elasticsearch) to monitor system health. Automate system management tasks using Ansible. Participate in an on-call rotation to support More ❯

Redefined, the UK's leading over-50s age inclusive jobs board. Job summary We are looking for a passionate individual to work as a Senior Imaging Systems Administrator within the DHCT Solutions section to help deliver this Dentistry technology change project that interfaces directly with our Imaging systems. Main duties of the job This … role will deliver direct project work to configure and enable this specific project whilst providing support/management to the overall Imaging systems that DHCT manage on behalf of the Trust. This includes identifying and planning all required configuration and implementation into the Imaging systems, liaising with both the supplier and the Dentistry department's project team, and … plans designed around patient needs. Our vision is to create a digitally enabled organisation that supports the delivery of efficient and effective patient care, achieved through easy-to-use systems that provide staff and patients with access to the right information, in the right place, at the right time. To help achieve this vision, UCLH has a major project More ❯