System Administrator - GammaLabs

At Gamma, we’re more than just a leader in Unified Communications as a Service ( UCaaS ) – we’re a dynamic, forward-thinking team , revolutioni s ing 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
• 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
• 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 7×24.

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!

Equity and Inclusion

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.