1 to 25 of 40 Senior Systems Administrator Jobs in the UK

Senior Systems Administrator At Forge, we bring together a global portfolio of market-leading businesses and specialist teams, connected by the technology and systems that help them do their best work. We’re collaborative, ambitious, and always looking for smarter ways to build … improve and grow. We’re looking for a Senior Systems Administrator to join our UK team, based in Shepherd’s Bush, London. We’re looking for someone experienced, proactive, and excited about taking ownership of a world-class tech environment and helping shape ...

Senior IT Systems Administrator/Bristol (3 days on-site)/£50,000–£60,000 | DV Clearance Eligibility Required Take ownership. Solve complex challenges. Make IT better. TwinStream is looking for an experienced Senior IT Systems Administrator to help keep our IT systems secure, resilient and performing at their best. This is a hands-on senior role offering the autonomy to tackle complex technical challenges, drive improvements, introduce automation and support colleagues across a growing business. About TwinStream Founded ...

Senior Business Systems Administrator - Business Systems, ERP, CRM, NetSuite, Salesforce, Integrations, Automation, API, SaaS Applications, Systems Administration, Business Applications, Process Improvement, Stakeholder Management, Change & Transformation, Configuration, Troubleshooting, Data Governance, Security, Access Management, SuiteScript, SQL, Celigo, Boomi, MuleSoft, Dynamics 365, Oracle, SAP, Workday … Business Systems Manager, Applications Manager, Enterprise Applications, Technical Support, Platform Ownership, System Enhancements - Sheffield - £65,000 - £70,000 Our client is seeking a Senior Business Systems Administrator to support and enhance a range of business-critical applications. The role will focus on systems ...

Senior Business Systems Administrator – Business Systems, ERP, CRM, NetSuite, Salesforce, Integrations, Automation, API, SaaS Applications, Systems Administration, Business Applications, Process Improvement, Stakeholder Management, Change & Transformation, Configuration, Troubleshooting, Data Governance, Security, Access Management, SuiteScript, SQL, Celigo, Boomi, MuleSoft, Dynamics 365, Oracle, SAP, Workday … Business Systems Manager, Applications Manager, Enterprise Applications, Technical Support, Platform Ownership, System Enhancements – London – £65,000 – £70,000 Our client is seeking a Senior Business Systems Administrator to support and enhance a range of business-critical applications. The role will focus on systems ...

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-year history and culture of innovation and mission focus, KBR creates sustainable value … operations and maintenance services to ensure consistent delivery with predictable results. At KBR, We Deliver.KBR is looking for a Senior IT Systems Administrator (Linux & HPC).**The Opportunity:**The Senior IT Systems Administrator (Linux & HPC) is responsible ...

Senior Research Systems AdministratorDigital and Information Services, Central OxfordWould you like to use your systems expertise to help shape a new University-wide research computing service from its foundations? As Senior Research Systems Administrator, you will combine deep Linux … interest-free loan to help cover the cost of a rental deposit in Oxford. About the Role 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 ...

more open, accountable internet. That is what drives the work we do. About the Position We're seeking a Senior Systems Administrator to keep our company running smoothly. The ideal candidate is a level-headed, hands-on specialist with deep experience configuring, managing … improvements Develop and maintain technical roadmaps aligned with business goals, collaborating with leadership to prioritize initiatives Design, implement, and continuously improve automated provisioning and systems management pipelines (CI/CD for IT tooling, endpoint management) Research and evaluate new technologies, tools, and vendors; lead proof-of-concept efforts ...

annum (up to £45,940 per annum for exceptional performance once in post) Basis Full time Job profile for Senior System Administrator (Revenues and Benefits) Senior System Administrator (Revenues and Benefits) Lyndhurst 08/10/2026 The job requirements … Full time Region South Job category/type Revenues, Benefits & Customer Services Date posted 28/09/2026 Attachments Senior Systems Administrator (Revenues and Benefits) Candidate Pack.pdf Local Government Reorganisation Information for Applicants.docx Customer Strategy - Customer Promise.pdf People strategy_document.pdf Job description ...

delighted to be working in partnership with an established market leader in managed communications technology and systems integration who develop their own products. For over 40 years, they’ve been at the forefront of innovation, transforming customer experiences through smarter communications, automation, analytics and AI. They deliver transformative communication … expands, they are looking to onboard a DevOps SysAdmin to support teams across the business for both internal and hosted infrastructures including hardware, operating systems and server-based applications. As a Senior DevOps Systems Administrator, you’ll lead automation efforts, work with cutting ...

Senior IT Systems Administrator £33,000 - £38,000 Middlesbrough Our client is a leading provider, and a massive name in the industrial sector. They are looking for an experienced 3rd line systems administrator to come in and hit the ground running … their growing in-house team in Middlesbrough. You will be responsible for the administration and optimisation of Microsoft-based infrastructure, cloud services and enterprise systems, providing third-line support and technical expertise across the organisation. You'll work closely with ICT teams and business stakeholders to ensure systems ...

date and time: 24-September-2026 12:45 Digital and Information Services, Central Oxford Would you like to use your systems expertise to help shape a new University-wide research computing service from its foundations? As Senior Research Systems Administrator , you will combine … interest‐free loan to help cover the cost of a rental deposit in Oxford. About the Role 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 ...

summary This Band 6 Senior Systems Administrator role sits within Research and Innovation and supports the National Pathology Imaging Co-operative (NPIC), a pioneering programme accelerating the use of digital pathology and artificial intelligence. You will lead the management, development and continuous improvement … critical IT systems and Service Desk services, working closely with clinicians, technical teams, system suppliers and partners across a national network to deliver reliable, high-quality digital services. This is an exciting opportunity for an experienced, proactive and customer-focused IT professional who enjoys solving complex problems and leading ...

Forest District Council seeks a Senior Systems Administrator (Revenues and Benefits) to manage crucial tax, business rates and benefits systems, delivering insight for decision making. You’ll partner with ICT and service managers to drive automation, data quality and digital change across Revenues ...

Forge in London (Shepherd’s Bush) seeks a Senior Systems Administrator to own and optimize a world-class IT environment across the UK and South Africa. You will manage Windows and Mac, cloud platforms, and security, with hybrid work and frontline accountability. ...

Location: Central Oxford We are seeking a full-time Senior HPC Systems Administrator to join the Department of Engineering Science at the University of Oxford, working within the newly established The British Open-ended Learning and Discovery (BOLD) Lab, a major new UK Research … funded initiative that will establish a world-leading AI research laboratory at the University of Oxford. This is an exciting opportunity for an experienced systems professional to lead the development, administration, and strategic evolution of the labs high-performance computing (HPC) infrastructure supporting cutting-edge fundamental AI research, with ...

Monitoring Consultant (OSS)/Senior IT Systems Administrator(FTC) About Indra Group UK & Ireland Indra is a leading global technology and consulting company, and a trusted technological partner for the core business operations of its clients worldwide. It stands at the forefront … About the Project Transport for London (TfL) has awarded Indra a long-term contract to operate, develop, enhance and expand ticketing and access control systems across London’s transport network through to 2034, with extension options to 2039. This programme covers the maintenance, operation and evolution of a large ...

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 junior team members in a fast-paced, mission-driven setting. You'll work with ...

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, ensuring security, audit readiness and runbooks. This ...

Business IT Manager, two Senior System Administrators, and a System Administrator. You will be the third Senior System Administrator, playing a key role in supporting our 400 staff across the 5th and 6th floors of our Hammersmith HQ. The team also provides … supports our two outsourced call centres located in India and South Africa. The impact you’ll have: As a Senior System Administrator, reporting directly to the Senior Business IT Manager, you will be responsible for the strategic and high-level operational support ...

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 NHS data‐intensive environment. The role requires hands ...

funding in order to design, build and deploy innovative AI systems. The Opportunity We are seeking a highly skilled Senior AI Systems Administrator to join our rapidly growing engineering team. You will provision and maintain multi-rack GPU server clusters designed for both inference … understanding of network design and switch/router/firewall configuration The desire to work collaboratively with users and other stakeholders to iteratively optimise systems Experience with any or all of the following will also be highly valued: High-performance or high-availability storage servers/clusters (Lustre, Ceph ...

CommonAI CIC in Cambridge is seeking a Senior AI Systems Administrator to design, deploy and maintain multi-rack GPU server clusters for inference and training. You will work at the intersection of high-end hardware and software orchestration, ensuring scalable, reliable infrastructure for advanced ...

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 ...

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 ...

Shield AI is seeking a highly autonomous Staff Systems Administrator to own enterprise IT infrastructure and end-user computing in a security-sensitive environment. You will design, operate, secure, and improve on-prem and cloud infrastructure, identity services, networks, and endpoints with strong adherence to compliance ...