6 of 6 Senior Systems Administrator Jobs in the UK

delighted to be partnering with Beonic, a global SaaS leader transforming how people interact with physical spaces—from airports to stadiums. We are hiring a Senior Systems Administrator to join their team in Belfast. About Beonic Beonic helps marketing, operations, and IT teams measure, predict, and influence customer behaviour across the physical and digital … Beonic IO , brings data together to help venues make smarter, more connected decisions. Learn more at beonic.com The Role We’re looking for an experienced Senior Systems Administrator to join our international team. You’ll manage Linux environments, optimize network infrastructure, and support clients across NORAM, EMEA, and APAC. This role combines technical leadership … secure remote access (SSH, VPNs, firewalls) Implement and improve server monitoring, maintenance, and automation Troubleshoot system and network performance issues Collaborate with DevOps and IT teams to support critical systems Document infrastructure and mentor team members Participate in on-call rotation for system support What You’ll Bring Advanced Linux administration skills Intermediate to advanced network administration experience Strong More ❯

A well-established organisation with multiple UK sites is seeking a Senior IT Systems Administrator to take ownership of its IT infrastructure across a growing network of offices. This is a hands-on role ideal for someone who enjoys solving complex technical challenges and is looking for a genuinely supportive, value-driven culture. You … ll be responsible for maintaining servers, networks, and systems, supporting users, and driving improvements in performance, security, and efficiency. Key Responsibilities: Manage and resolve support tickets across teams Administer Windows/Linux servers, virtual environments, and network components Maintain Active Directory, SQL Servers, and telephony systems Implement cybersecurity best practices and disaster recovery plans Collaborate with internal developers More ❯

This is an excellent opportunity for Senior Linux HPC Systems Administrator/Engineer professionals to be part of leading-edge technology projects. Cognizant’s Cloud, Infrastructure & Security Services Practice provides end-to-end solutions covering architecture, design, implementation, management, and on-going support across the entire enterprise technology infrastructure. Our services include a spectrum … of management, consulting, and systems integration services to help our clients maximize value in their infrastructure resources, while optimizing infrastructure performance and cost. Key Responsibilities Administer, configure, and maintain RHEL environments (specifically RHEL 8 & 9) ensuring stability, performance, and security. Provide hands-on support with high-end workstation hardware for scientists, promptly addressing hardware and software issues. Offer technical … understanding the impact of GPUs, networking, and other hardware components. Handle vendor relationships effectively, coordinating with external partners to resolve issues and optimize service delivery. Maintain familiarity with MacOS systems to provide assistance when necessary. Required Skills Good enterprise IT experience with extensive hands-on expertise in RedHat Enterprise Linux (RHEL), specifically RHEL 8 & 9. Proven experience with high More ❯

This is an excellent opportunity forSenior Linux HPC Systems Administrator/Engineerprofessionals to be part of leading-edge technology projects. Cognizants Cloud, Infrastructure & Security Services Practice provides end-to-end solutions covering architecture, design, implementation, management, and on-going support across the entire enterprise technology infrastructure. Our services include a spectrum of management, consulting, and systems … understanding the impact of GPUs, networking, and other hardware components. Handle vendor relationships effectively, coordinating with external partners to resolve issues and optimize service delivery. Maintain familiarity with MacOS systems to provide assistance when necessary. Required Skills Good enterprise IT experience with extensive hands-on expertise in RedHat Enterprise Linux (RHEL), specifically RHEL 8 & 9. Proven experience with high More ❯

Main purpose of job To define, develop and administer the company's critical business systems (NetSuite/HubSpot) Key responsibilities, duties and tasks Administration & Configuration Oversee setup and configuration of NetSuite and HubSpot, including user roles, permissions, workflows, and system preferences. Ensure alignment of system configurations with business processes and compliance requirements. Perform routine maintenance, manage updates, and troubleshoot … system capabilities. Develop and maintain custom scripts and workflows using SuiteScript, JavaScript, and SuiteQL to automate tasks and improve efficiency. Collaboration & Optimisation Lead integration efforts between ERP/CRM systems and other business platforms. Optimize system performance and user experience through tailored configurations and enhancements. Work closely with Finance, Sales, Operations, and other departments to translate business needs into … and reporting. Proficient in scripting in multiple languages such as SuiteScript and Java Script. Strong technical and analytical skills It is desirable that the postholder has: Understanding of CRM systems such as HubSpot. Experience working with financial and sales data. Experience and knowledge It is essential that the postholder has: Experience administering Netsuite. Ideally 3 + years' experience. Strong More ❯

Job Title: Senior System Administrator Work Model: Hybrid (3 days onsite) Location: Camberley Commutable Distance: Candidates should be within 20 miles of Camberley Pay Rate: £400-£550 per day Length of Contract: 12 Months About the Role We're seeking an experienced Senior System Administrator with deep expertise in Red More ❯