Systems Administrator 24/7

Job Description

This hybrid role offers a great balance of home and office working. You’ll join your colleagues in your local office at least 2 days a week.

Please note: The on-call rota is 1 week in 3 - on-call for a 7 day period every 3 weeks. First point of contact outside office hours, i.e. Monday to Friday 17:30-09:00 and for the weekend from 17:30 Fri to 09:00 Monday to deal with any incidents which require the Systems Administrator support.

As the UK’s largest fibre-only network, and its only proven wholesale challenger, we’re busy setting new standards for what digital infrastructure can and should be.

Designed from scratch for the internet, our network is greener, more reliable and ready for the future. The products we provide over it not only lead the market on speed, value and service, they help businesses to innovate, provide entire communities with a better foundation for their digital lives and support economic growth, locally and nationally.

What does that mean for you? The opportunity to make internet connections (and daily life) a whole lot better, for a lot of people!

Joining us as a Systems Administrator 24/7

Are you someone who enjoys solving infrastructure challenges, improving systems through code, and working in a collaborative, high-impact team? We’re looking for a proactive and curious Systems Administrator to join our dynamic Platform team, where you’ll play a key role in supporting, scaling, and evolving our cloud infrastructure.

This is a hands-on role focused on maintaining the health, performance, and reliability of our systems, while contributing to ongoing improvements across the platform. You’ll work closely with engineers across the business to manage infrastructure as code, streamline deployments, and enhance monitoring and alerting.

You’ll receive a competitive salary, a performance related bonus, and a range of benefits to support you across your financial, physical and mental wellbeing.

This is some of what you can expect to be doing:

• Maintain and support AWS cloud infrastructure to ensure performance and reliability across environments
• Act as the first point of escalation for infrastructure incidents, ensuring timely resolution and documentation
• Deploy and manage infrastructure using tools like Ansible, focusing on consistency and automation
• Monitor system health using observability tools and ensure alerts reach the right teams
• Collaborate with engineering teams to support CI/CD pipelines and cloud-native applications
• Manage core services including DNS, networking, and firewall changes to keep environments secure and performant

What you’ll bring to the role

You’ll have solid experience in systems administration, with a proven ability to deploy and support operating systems and applications across both Linux and Windows environments. You’re someone who’s curious, proactive, and excited about using technology to make systems faster, more secure, and easier to manage. You’ll also bring:

• Expertise in DNS management and core networking fundamentals
• Proven experience in provisioning, managing, and troubleshooting services within AWS
• Hands-on experience with Infrastructure as Code (e.g. Ansible) for consistent and scalable deployments
• Working knowledge of at least one scripting language to quickly prototype and automate solutions

Diversity, Inclusion & Belonging

We’re a Times Top 50 Employer for Gender Equality. We’re endorsed by WORK180 and we’re a partner of Diversifying. We have pledged our commitment to the Armed Forces Covenant and we’re a Disability Confident Employer. Working together with our Employee Networks, we’re wholly committed to ensuring that our people’s voices are heard, and that everyone feels a sense of belonging and pride to be a part of CityFibre. If you’d like to explore our culture and values, check out The CityFibre Way.

What you can expect from us

We want to offer you all the support you need to thrive inside and outside of work. This means giving you the tools to grow your career with us, as well as a comprehensive benefits package that you can adapt to your lifestyle. This includes 25 days annual leave, a day off on your birthday, a day off to support a charity or organisation of choice, a range of wellbeing and savings initiatives including private medical insurance, and supportive family friendly and menopause policies.

Additional InformationWe want to create a sense of belonging for everyone. We celebrate our differences and work to ensure everyone has the best chance to succeed, starting with our recruitment process. No matter your background, family or carer status, ethnicity, sexual orientation, religion, age, disability, gender, or gender identity, we welcome your application. If you need any support or reasonable adjustments throughout the application process, please email us at [email protected]. We want to help!