1 to 25 of 33 Senior Systems Administrator Jobs in the UK

We’re Hiring: Senior Systems Administrator | London Permanent | Full-Time | Immediate Start Available A small, high-performing team of researchers and developers working at the forefront of financial and market analysis is looking for a Senior Systems Administrator to help manage and scale their technology infrastructure. This is … tech stack, contribute directly to the operational success of a dynamic environment, and be part of a tight-knit, collaborative team. About the Role As Senior Systems Administrator, you'll play a critical role in maintaining and improving infrastructure that supports 24/7 operations. You'll be responsible for systems administration, monitoring … of on-site and off-site servers Monitoring internal applications and system performance Managing Microsoft Windows environments, including Active Directory and Group Policy Overseeing NAS, iSCSI, and other storage systems Supporting and improving network infrastructure Writing and maintaining scripts for automation and system optimisation Supporting virtualisation platforms (Hyper-V) Collaborating closely with developers and operational teams What You Bring More ❯

We’re Hiring: Senior Systems Administrator | London Permanent | Full-Time | Immediate Start Available A small, high-performing team of researchers and developers working at the forefront of financial and market analysis is looking for a Senior Systems Administrator to help manage and scale their technology infrastructure. This is … tech stack, contribute directly to the operational success of a dynamic environment, and be part of a tight-knit, collaborative team. About the Role As Senior Systems Administrator, you'll play a critical role in maintaining and improving infrastructure that supports 24/7 operations. You'll be responsible for systems administration, monitoring … of on-site and off-site servers Monitoring internal applications and system performance Managing Microsoft Windows environments, including Active Directory and Group Policy Overseeing NAS, iSCSI, and other storage systems Supporting and improving network infrastructure Writing and maintaining scripts for automation and system optimisation Supporting virtualisation platforms (Hyper-V) Collaborating closely with developers and operational teams What You Bring 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 ❯

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 ❯

Working within a small systems team supporting the business across 2 sites supporting all departments and users, you will report to the head of department and provide support for systems and infrastructure. You will be responsible for effective provisioning, installation/configuration, operation, and maintenance of systems hardware and software and related infrastructure. This role requires the … individual to participate in technical research and development to enable continuing innovation within the infrastructure. This individual ensures that system hardware, operating systems, software systems, and related procedures are in line with the organisations requirements and strategic direction. The scope of the role includes responsibility for internal infrastructure hardware and software as well as operational infrastructure including online … systems, extending to cloud-based services where appropriate. Where required there will need to be involvement in new project work, where a hardware or software solution is needed to deliver the project, this may include suggestions for solution delivery both in terms of hardware/software and appropriate proof of concept work and testing. The role requires the creation 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 ❯

Join to apply for the Senior Cloud Systems Administrator role at DXC Technology 4 days ago Be among the first 25 applicants Join to apply for the Senior Cloud Systems Administrator role at DXC Technology Job Description At DXC Technology, delivering excellence for our customers and colleagues is … function Information Technology Industries IT Services and IT Consulting Referrals increase your chances of interviewing at DXC Technology by 2x Get notified about new Senior System Administrator jobs in Gloucester, England, United Kingdom . Gloucestershire, England, United Kingdom 2 weeks ago Gloucester, England, United Kingdom 5 days ago Gloucestershire, England, United Kingdom 6 days ago … Systems Administrator - Revenues, BRIDGEND COUNTY BOROUGH COUNCIL Stonehouse, England, United Kingdom 2 weeks ago Gloucester, England, United Kingdom 1 month ago Gloucester, England, United Kingdom 4 days ago Tewkesbury, England, United Kingdom 1 year ago Gloucester, England, United Kingdom 2 weeks ago Hereford, England, United Kingdom 8 hours ago Cambridge, England, United Kingdom 3 weeks ago Gloucester More ❯

collaborative environment that inspires the cross-fertilization of ideas necessary for true innovation. For more information about Draper, visit www.draper.com. Job Description Summary: The Senior Classified Systems Administrator supports the day-to-day activities of users, perform system maintenance, and upkeep of Information Technology and the design, development, documentation and deployment of IT solutions. … Duties include data administration, knowledge management, customer service, technical support, network services, system administration and systems security analysis. Installs, configures, troubleshoots, and maintains server configurations (hardware and software) to ensure their confidentiality, integrity, and availability. Also manages accounts, firewalls, and patches. Responsible for implementing access control, resetting passwords, account creation, and general administration. Job Description: Duties/Responsibilities * Install … test plans, change requests, and communication to users. * Conduct reviews and technical inspections to identify and mitigate potential security weaknesses, and ensure security compliance is implemented and all necessary systems are functional. * Provide resolutions to an assortment of customer defined problems of moderately complex scope. using knowledge and resources to diagnose and resolve basic technical issues. * Escalate issues that More ❯

Job Description: Job Title: Senior Cloud Systems Administrator Location: Gloucestershire Employment Type: Permanent Salary: Competitive About DXC Technology DXC Technology is a global leader in IT services, helping organizations modernize their IT infrastructure, optimize business operations, and drive digital transformation. With a presence in over 70 countries, DXC delivers mission-critical IT services across … We work closely with our clients to maximize efficiency, improve security, and accelerate innovation through cutting-edge technology solutions. We are currently seeking a Senior Cloud Systems Administrator to join our team and play a key role in designing, managing, and maintaining enterprise cloud environments. Role Overview As a Senior Cloud … Systems Administrator, you will be responsible for the design, deployment, migration, management, and continuous improvement of cloud-based and on-premises infrastructure services. You will work with a variety of technologies, including public and private clouds, virtualization platforms, storage, networks, and security solutions. This role will require strong technical expertise, problem-solving skills, and the ability to More ❯

Senior Systems Administrator | £55,000 to £65,000 | Cambridge, Hybrid Working We’re hiring on behalf of a tech-driven client based in Cambridge, who is seeking a seasoned Linux and Windows expert.If you're passionate about Systems Administration, thrive in high-performance environments, and want to work with a company that truly … values technical excellence, this is the opportunity for you. As a Senior Systems Administrator, you will be a key player in managing and optimising Linux and Windows operating systems. You'll be responsible for ensuring system reliability, performance, and security across a wide array of critical services. Key Skills: Strong knowledge of Windows Server … systems administration Strong knowledge of Linux systems administration (Ubuntu, Exim, DoveCot, Samba, Apache2, OpenSSL, PAM, SELinux) Strong networking skills (e.g. TCP/IP, DNS, ports and protocols, routers, bridges, latency, packet loss, firewall rules, VPNs, knowledge of MTUs etc.) Ability to lead on critical projects Excellent communication skills If you have the above and want to be considered More ❯

Social network you want to login/join with: Senior System Administrator, oxford district col-narrow-left Client: Burman Recruitment Location: oxford district, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Views: 2 Posted: 27.06.2025 Expiry Date: 11.08.2025 col-wide Job Description: Overview We are seeking an experienced and … technically skilled Systems Administrator and IT Support Specialist to join a highly collaborative digital learning and support team based in Oxford. This is a key role responsible for maintaining a robust and secure infrastructure that supports large-scale online course delivery, including the administration of a Moodle Virtual Learning Environment (VLE) and related systems. You will lead … on the technical administration of Linux-based systems and be the senior technical contact for IT support queries, including tier 3 support for staff and students. In addition to infrastructure responsibilities, you’ll supervise a small IT helpdesk team and play a strategic role in enhancing support operations and researching emerging tools and technologies to drive More ❯

Social network you want to login/join with: We are seeking an experienced and technically skilled Systems Administrator and IT Support Specialist to join a highly collaborative digital learning and support team based in Oxford. This is a key role responsible for maintaining a robust and secure infrastructure that supports large-scale online course delivery, including … the administration of a Moodle Virtual Learning Environment (VLE) and related systems. You will lead on the technical administration of Linux-based systems and be the senior technical contact for IT support queries, including tier 3 support for staff and students. In addition to infrastructure responsibilities, you’ll supervise a small IT helpdesk team and play … and researching emerging tools and technologies to drive innovation in online learning delivery. Some remote working is possible, but regular on-site work in Oxford is essential. Key Responsibilities Systems Administration Manage and maintain Linux (Debian) servers in a virtualised environment, supporting applications such as Moodle, WordPress, and Puppet Oversee the administration of a Moodle VLE including user account 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. Multiple locations - the London office is small 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 ❯

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 ❯

HR Knowledge Management Employee Service Center (Portal) Enterprise Onboarding and Transitions (Lifecycle Events) Employee Document Management Performance Analytics for HR – Participates in requirements discussions – Coordinates with HRIT System Administrator and Platform Administrator to assist with ServiceNow patches and when the patches are applied to instances – Designs, configures, and customizes new HR applications and HR Service processes … in all phases of testing and go-live activities – Maintains the configuration and updates to the HR platform once the system is live, in partnership with the Platform Administrator Qualifications Skills – 5+ years’ experience … implementing, configuring and customizing ServiceNow – 5+ years’ experience with HR Service Management and related tools – Integration exposure with HRSM/HRIS system (Workday, SAP SuccessFactors) – Knowledge of related HR systems and their functions – Experience in implementing ServiceNow processes and functions Training – Foundations eLearning – ServiceNow Fundamentals – HR Service Delivery Fundamentals – Service Portal Fundamentals (if implementing) – Performance Analytics Fundamentals (if implementing More ❯

shared vision of deploying and building products to electrify homes that are connected through an integrated software platform. We are looking for a proactive Senior IT Systems Administrator to act as the operational heart of the global IT team. Reporting to the Head of IT and collaborating closely with other members in the global … team, you will play a pivotal role in supporting the IT systems and operations at Lunar Energy. On a given day at Lunar, you will:- Administer the company's SaaS platforms, as well as support remote users with day-to-day issues. Implement a new automation or integration system between our services to streamline data flows, and document it … procurement Day-to-day end-user support Backup support for user onboarding/offboarding and basic training Required Experience & Skills:- A minimum of 5 years' work experience within IT Systems administration in any sector Proficiency in Okta and Google Workspace administration Experience with Okta Workflows for workflow automation Expertise in MacOS and Windows device support & management - 2nd/3rd More ❯

exclusive features. Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Job Description Job Title: Senior Cloud Systems Administrator Job Description Job Title: Senior Cloud Systems Administrator Location: Gloucestershire Employment Type: Permanent Salary: Competitive About DXC Technology DXC Technology … We work closely with our clients to maximize efficiency, improve security, and accelerate innovation through cutting-edge technology solutions. We are currently seeking a Senior Cloud Systems Administrator to join our team and play a key role in designing, managing, and maintaining enterprise cloud environments. Role Overview As a Senior Cloud … Technology Industries IT Services and IT Consulting Referrals increase your chances of interviewing at DXC Consulting & Engineering Services by 2x Get notified about new Senior System Administrator jobs in City, Wales, United Kingdom . Cardiff, Wales, United Kingdom 1 month ago Internal Applicants Only - Service Management Advisor - Service Desk Systems and Infrastructure (Intelligent Infrastructure More ❯

build solutions leveraging state-of-the-art Artificial Intelligence, Machine Learning and Deep Learning tools on Amazon Web Service (AWS)? Would you like to focus on developing agentic AI systems for our Europe North customers? Come join us! At Amazon, we’ve been investing deeply in artificial intelligence for over 20 years, and many of the capabilities customers experience … Amazon Bedrock, Amazon SageMaker, and Amazon Q. As part of the team, you will work closely with customers to enable large-scale use cases, design GenAI pipelines, build agentic systems and drive the adoption of AWS for the AI/ML platforms. You will interact with other SAs in the field, providing guidance on their customer engagements, and you More ❯

Job Role Working within a small systems team supporting the business across 2 sites supporting all departments and users, you will report to the head of department and provide support for systems and infrastructure. You will be responsible for effective provisioning, installation/configuration, operation, and maintenance of systems hardware and software and related infrastructure. This role … requires the individual to participate in technical research and development to enable continuing innovation within the infrastructure. This individual ensures that system hardware, operating systems, software systems, and related procedures are in line with the organisations requirements and strategic direction. The scope of the role includes responsibility for internal infrastructure hardware and software as well as operational infrastructure … including online systems, extending to cloud-based services where appropriate. Where required there will need to be involvement in new project work, where a hardware or software solution is needed to deliver the project, this may include suggestions for solution delivery both in terms of hardware/software and appropriate proof of concept work and testing. The role requires More ❯

Senior Systems Administrator Prerequisites IT Systems and Infrastructure experience & knowledge (4-5+ years) A self-motivated individual with excellent problem-solving skills A trustworthy team player with good communication skills Working within a small systems team supporting the business across 2 sites supporting all departments and users, you will report to … the head of department and provide support for systems and infrastructure. You will be responsible for effective provisioning, installation/configuration, operation, and maintenance of systems hardware and software and related infrastructure. This role requires the individual to participate in technical research and development to enable continuing innovation within the infrastructure. This individual ensures that system hardware, operating … systems, software systems, and related procedures are in line with the organisations requirements and strategic direction. The scope of the role includes responsibility for internal infrastructure hardware and software as well as operational infrastructure including online systems, extending to cloud-based services where appropriate. Where required there will need to be involvement in new project work, where More ❯

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 … 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. Presentation Tier Administration: Manage and maintain Citrix NetScaler for load balancing … Virtual Apps, Remote Desktop Services and Azure Virtual Desktop to deliver hosted applications and ensure a seamless end-user experience. Windows Server Administration: Deploy, configure, and manage Windows Server systems in private and public cloud-hosted setups. Configure and troubleshoot Group Policy Objects (GPOs) to enforce security and operational policies. Perform advanced troubleshooting to quickly resolve issues affecting hosted More ❯

includes furthering the skills of our colleagues. At DXC, building a better you, builds a better us. At DXC, one of our platinum accounts has opening for a Senior Cloud System Admin at a high skill level. The successful candidate will work within multiple teams and will be innovative and analytical with a good eye for detail. More ❯

Senior System Administrator Infrastructure Date: Mar 14, 2025 Location: Dalgety Bay, GB, KY11 9JU Ingenico is the global leader in payments acceptance solutions. As the trusted technology partner for merchants, banks, acquirers, ISVs, payment aggregators and fintech customers, our world-class terminals, solutions and services enable the global ecosystem of payments acceptance. With 40 years … DRBD failover for KVM , virtual infrastructures (KVM, VMware), and Docker environments . Support open-source tools (Stunnel, reverse proxy, Zabbix) & enhance security using Ansible, Terraform, Python . Maintain storage systems (Dell Compellent, EMC) & PowerEdge servers . Collaborate with project & dev teams , provide on-call support , and adapt to evolving technologies. Handle firewalls, network configurations, data center racking/cabling More ❯

Job summary The role provides specialist support for the Trust's Financial Systems, with a focus on eFinancials (EFIN) and reporting tools. The postholder is responsible for maintaining system integrity, managing user access, and supporting end-users across the Trust to ensure smooth financial processes. Key duties include maintaining accurate master data, performing system cleansing, monitoring purchase order transmissions … use. Additional responsibilities include system testing, reporting, managing data extracts, and maintaining system interfaces. The role requires discretion when handling sensitive information and the ability to manage multiple live systems in a fast-paced environment. Main duties of the job To support the administration and operation of core Finance and Procurement computer-based systems (Financial Systems).To … the Trust, providing technical problem-solving support as required.Maintain the software, and implement changes to the Trust's Corporate Finance reporting systems.To monitor and run interfaces between the Financial Systems and other Trust systems. Identify opportunities for process improvement and develop efficient automation solutions using Microsoft Power Automate (including Power Automate Desktop) and other relevant tools.Design, develop, and maintain More ❯