2,283 Informationtechnology jobs in the United Kingdom

A bit about us

At Gamma, we're more than just a leader in Unified Communications as a Service (UCaaS) – we're a dynamic, forward-thinking team, revolutionising the way businesses connect and communicate. We provide voice, data, and mobile solutions to businesses across the UK, Germany, Spain, and the Benelux region, and we're expanding rapidly to bring digital automation and Gamma-powered services to SMEs through a growing network of channel partners.

We move fast with a start-up mindset, but we have the stability of a leading European business. Our team thrives on collaboration, innovation, and the belief that diverse perspectives make us stronger. Join us, and you'll have the opportunity to make an impact, grow your career, and be part of a company that celebrates inclusivity and fresh ideas.

Who are we looking for?

The System Administrator will provide operational support, administration, and maintenance of all OSS/BSS servers, including building new servers and maintaining the existing estate of over 600 servers hosting internal and customer facing applications and services.

What will you be doing day-to-day?

You will be responsible for building and maintaining secure Microsoft Windows servers to host company applications and services, ensuring these systems are up to date with the latest security patches and that any identified vulnerabilities are quickly addressed.

You will ensure reliable operational systems are in place and that systems are monitored in a way that allows issues to be identified quickly and dealt with proactively.

You will gain an architectural overview and knowledge of the following systems:

Middleware components

Database structure

Provisioning flow

Log locations

Common workarounds and scenarios

Integrations with other applications and products

You will be responsible for the creation and maintenance of documentation pertinent to the team.

You will be responsible for ensuring servers are backed up according to business requirements and that restore procedures are in place and regularly tested.

You will take part in a rota providing a 24/7 On Call Service.

What You'll Need

Experience of supporting a large Microsoft Windows Server estate

Required knowledge:

Windows Server Administration

IP Networking

PowerShell

VMWare

Desirable knowledge:

Security & Anti-Malware tools

Disaster Recovery and Backup tools: Commvault, Zerto

Vulnerability and Patch Management tools: Nucleus, Shavlik

Monitoring tools: Nagios, Prometheus, Grafana, Elastic, Dynatrace

Database Administration: Microsoft SQL Server

Container Platforms: Docker, Kubernetes

Application Support: Java, Tomcat, Nginx, RabbitMQ, ActiveMQ

Automation: Git, Bitbucket, Jenkins, Terraform

Public & Private Cloud: AWS, Azure

Ability to work under pressure and manage the demands of numerous tasks.

Clear written communication and ability to produce coherent documentation.

Able to work on own initiative and effectively in partnership with others.

Experience of working in a Telecoms company is highly desirable.

Special Requirements:

OOH On call rota 7x24.

Some overtime is required to complete changes and install system security patches outside of standard business hours.

Some (limited) travel to other office's locations maybe expected under extreme circumstances, but this is not expected to be the norm.

What do we offer you?

At Gamma, we believe in work-life balance, which is why we offer 25 days of annual leave, plus an extra day off for your birthday. Giving back is important to us, so we also provide a volunteer day to support a charity that matters to you.

Family matters, too. With enhanced maternity and paternity pay, we're here to support you as a parent and help you thrive in your career.

We offer a contributory pension plan to help you save for the years ahead, with Gamma's contribution varying dependant on yours.

Your well-being is our priority. We offer group income protection and life assurance (four times your salary) to ensure peace of mind for you and your loved ones.

We want you to share in our success. That's why we offer tax-efficient share save and share incentive plans, giving you the opportunity to benefit from Gamma's growth.

We're committed to health, both physical and mental, and provide private medical insurance through Vitality, which extends to your immediate family.

And, because we care about the environment, we offer an Electric Vehicle scheme through Octopus and a Cycle to Work scheme, making it easier to get around sustainably.

A few things to note

Unfortunately, we can't offer visa sponsorship or relocation support for this role.

If you feel you could be a good fit for Gamma but do not think that you meet all the requirements, we still encourage you to apply as you could be the person that we are looking for

Gamma is an equal-opportunity employer. We care about inclusion and believe in having diverse teams where everyone can be their true authentic selves. We value each person and their range of backgrounds and actively encourage people from underrepresented backgrounds to apply.

We don't discriminate based on any protected characteristics e.g., race, colour, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, marital status, disability, or age. We are a family-friendly employer with a culture based on trust, autonomy, and flexibility to help you create a work-life balance and enjoy working here at Gamma.

For recruitment agencies – we have a network of fantastic partners that support us in our hiring from time to time. We're not looking to increase that network currently, so please don't send speculative CVs.

Senior IT Systems Administrator

Location: Gloucestershire, UK (On-Site)

Employment Type: Full-time, Mid-Senior level

About the Opportunity

Sanderson is collaborating with a leading global technology organisation that delivers mission-critical services in secure environments for government and national security clients. The team is expanding and seeking a skilled Senior IT Systems Administrator to join a high-performance environment supporting critical infrastructure operations.

In this role, you’ll work across multiple teams to ensure stability, performance, and compliance across enterprise systems — maintaining secure IT environments and helping drive continual service improvement through innovation and best practice.

Key Responsibilities

• Provide 1st and 2nd line technical support across complex IT environments
• Monitor system performance to ensure uptime, reliability, and efficiency
• Develop, maintain, and update system documentation
• Implement and enforce operational standards, policies, and procedures
• Support compliance initiatives and internal process improvements

Essential Skills & Experience

• Strong background in Windows Server Administration (2016/2019)
• Experience working to ITIL best practices
• Excellent organisational and time management skills
• Analytical mindset with a proactive approach to identifying risks and improvements
• Strong communication and collaboration skills, with a willingness to share and learn

Desirable Technologies & Experience

• Installation, upgrade, configuration, and support experience with Windows Server, AWS, and Azure
• Strong understanding of Active Directory (object creation, OU management, RBAC, DFS)
• Knowledge of virtualisation technologies : VMware, vSphere, vSAN, SCVMM, Hyper-V
• Familiarity with containerisation tools and technologies
• Networking fundamentals: TCP/IP, DHCP, DNS, LAN/WAN
• Scripting experience in PowerShell
• Awareness of McAfee EPO/ENS security tools

Security Clearance Requirements

Due to the nature of the work, candidates must be eligible for national security clearance . To meet this requirement, applicants must:

• Be sole British citizens (dual nationality is not permitted)
• Have not spent more than 30 consecutive days outside the UK in the past 10 years
• Have no criminal record
• Have no significant financial irregularities (e.g. bankruptcy, unpaid debt)

Unfortunately, candidates who do not meet these criteria cannot be considered for this position.

Why You’ll Enjoy Working Here

• Competitive salary and comprehensive benefits package
• Hybrid working model balancing flexibility and collaboration
• Career growth opportunities through continuous learning and development
• Work on high-impact, nationally significant projects
• Inclusive, people-first culture focused on wellbeing and professional excellence

Workday System Administrator

Maple Cross

Salary: £70,000 – £80,000 + Package

We are seeking a Workday System Administrator to take ownership of our Workday platform and play a pivotal role in optimising HR systems across a growing international business. This is a hands-on role, ideal for someone who enjoys both the detail of day-to-day administration and the challenge of delivering continuous improvement.

Key Responsibilities

• Act as the primary administrator and subject matter expert for Workday across HCM, Recruitment, Absence, Time Tracking, and Talent.
• Provide first-line support for Workday queries, tickets, and user issues.
• Manage role-based security and ensure compliance with GDPR and data governance.
• Coordinate with external AMS providers , managing escalations, enhancements, and agile delivery cycles.
• Lead on configuration and optimisation , implementing process changes, automation, and new functionality.
• Support Workday release management , including testing, stakeholder communication, and change adoption.
• Build and maintain dashboards, custom reports, and audits to ensure data integrity and provide actionable insights.

About You

• Proven, hands-on experience administering and configuring Workday , particularly HCM.
• Strong track record of managing tickets, security, and system queries.
• Comfortable working with external AMS partners and familiar with agile delivery practices .
• Excellent communication, stakeholder engagement, and documentation skills.
• Background in HR systems, HR operations, or HR technology within complex organisations.

Desirable

• Experience supporting global or multi-entity Workday environments.
• Knowledge of Workday reporting tools and advanced reporting.
• Strong Excel and data management skills.

Linux System Administrator

Location: Gloucestershire, UK (On-Site)

Employment Type: Full-time, Mid-Senior level

About the Opportunity

Sanderson is collaborating with a leading global technology organisation delivering mission-critical infrastructure and secure digital services across the public sector. The team is expanding and looking for Senior Linux System Administrators to join a high-performing environment working on nationally significant projects .

You’ll be part of a skilled technical team responsible for maintaining and improving secure Linux environments, ensuring stability, performance, and compliance. The role offers hybrid working and exposure to some of the most advanced secure computing environments in the UK .

Key Responsibilities

• Provide 1st and 2nd line technical support for Linux-based systems and infrastructure
• Monitor overall system performance, proactively identifying risks or issues
• Develop and maintain system documentation and operational procedures
• Implement, support, and maintain standards, policies, and procedures for continual service improvement
• Collaborate with internal teams to enhance automation and system reliability

Essential Skills & Experience

• Strong knowledge of Linux system administration (RHEL/CentOS 6/7/8)
• Experience working to ITIL best practices
• Excellent organisation, time management, and troubleshooting skills
• A proactive mindset focused on process improvement and root cause analysis
• Strong communication skills and willingness to share knowledge within a team

Desirable Technologies

• Automation tools: Ansible, Puppet
• Red Hat ecosystem: Satellite 6, OpenShift 3/4, RHEL Atomic/CoreOS
• Scripting: Bash, Python, Git
• Cloud: AWS
• Solid understanding of command line interfaces (CLI)

Security Clearance Requirements

Due to the nature of the work, candidates must be eligible for national security clearance . To meet this requirement, applicants must:

• Be sole British citizens (dual nationality is not permitted)
• Have not spent more than 30 consecutive days outside the UK in the past 10 years
• Have no criminal record
• Have no significant financial irregularities (e.g. bankruptcy, outstanding debts)

Unfortunately, candidates who do not meet these criteria cannot be considered for this position.

Why You’ll Enjoy Working Here

• Competitive salary and comprehensive benefits package
• Hybrid working environment with flexible options
• Access to industry-leading learning & development resources
• Opportunities to work on high-impact, mission-critical projects
• A strong emphasis on collaboration, wellbeing, and career growth

Workday System Administrator

Maple Cross

Salary: £70,000 – £80,000 + Package

We are seeking a Workday System Administrator to take ownership of our Workday platform and play a pivotal role in optimising HR systems across a growing international business. This is a hands-on role, ideal for someone who enjoys both the detail of day-to-day administration and the challenge of delivering continuous improvement.

Key Responsibilities

• Act as the primary administrator and subject matter expert for Workday across HCM, Recruitment, Absence, Time Tracking, and Talent.
• Provide first-line support for Workday queries, tickets, and user issues.
• Manage role-based security and ensure compliance with GDPR and data governance.
• Coordinate with external AMS providers , managing escalations, enhancements, and agile delivery cycles.
• Lead on configuration and optimisation , implementing process changes, automation, and new functionality.
• Support Workday release management , including testing, stakeholder communication, and change adoption.
• Build and maintain dashboards, custom reports, and audits to ensure data integrity and provide actionable insights.

About You

• Proven, hands-on experience administering and configuring Workday , particularly HCM.
• Strong track record of managing tickets, security, and system queries.
• Comfortable working with external AMS partners and familiar with agile delivery practices .
• Excellent communication, stakeholder engagement, and documentation skills.
• Background in HR systems, HR operations, or HR technology within complex organisations.

Desirable

• Experience supporting global or multi-entity Workday environments.
• Knowledge of Workday reporting tools and advanced reporting.
• Strong Excel and data management skills.

Job title: Linux System administrator

Location : Cambridge- 3 Days a Week

Type: Contract

Client: Wipro

Mandatory Skills: Linux Admin

Experience: 5-8 Years

• Experience running and maintaining on-premise data centres

• Strong experience with Linux (Ubuntu / Centos)

• Experience enterprise storage including ISCSI and SAN technology

• Prior experience using automation tools (Ansible, Foreman etc)

• Knowledge of IP networking, DNS, and firewalling

• Experience with Python, shell scripts and command-line tools

• Knowledge of containerisation and related orchestration technologies

• Demonstrable experience of remediation projects, ideally within a PCI-DSS certified environment.

• Strong verbal & written communication skills and natural willingness to collaborate across teams and organisations.

• Naturally able & productive with ITSM tools such as Jira, ServiceNow etc.

Great to haves:

• Good knowledge of the various services and capabilities of cloud computing platforms; Ideally AWS

• Hyper-V, Microsoft AD, AAD & VMWare experience

• Experience maintaining OpenStack

• Experience maintaining build system, source code management, TeamCity and GitLab services

• Bachelor’s degree in a related field (Computer Science preferred) or equivalent experience

Program/Project Overview

M&A Feature space O&I integration

Engagement Deliverable(s)

Get to target state program and integration of Feature Space