"When I first joined GMSL in 2023, I had no idea of what working in the gas and power industry would entail. Adapting to an on-shift rota was difficult at first, but the friendly atmosphere in the office and the good work-life balance makes it very worthwhile.

Everyone is willing to help one another out, and although we maintain a professional setting, it’s a relaxed environment to work in. The fast-paced, dynamic nature of the industry always keeps me busy, and each day brings its own unique challenges, which makes the job so rewarding and interesting."

"I joined the 24/7 gas operations team with very little background knowledge about the industry. We maintain an informal but professional atmosphere, with regular social events organised."

Working a mixture of hours has its challenges, but is compensated by generous time off. I enjoy the non-routine nature of the job, no two days are the same and you are encouraged to take on responsibility at a relatively early stage.

I now lead a shift team which has given me additional responsibility. It requires a significant amount of prioritisation and multi-tasking, but the great thing is that there is always someone around to help if you are a little snowed under. I’d recommend the role to anyone who has a positive attitude, is a good team worker, and wants to work in a fast-paced and fascinating industry."

"I have worked at GMSL for 17 years, spending time on both the gas and power operations desk and the TSO desk. During this period, I have built a strong understanding of day-to-day gas operations, supply and demand balancing, and system coordination, while also gaining insight into the wider European energy market. My time on the gas operations desk gave me a solid grounding in managing flows, handling nominations, and supporting reliable service. Moving onto the TSO desk allowed me to broaden my skills further, working more closely with system operators and contributing to market integration across regions.

Over the years, I’ve seen the industry face major changes, from evolving market structures to the challenges of the energy transition. Being part of that journey has been both rewarding and a constant learning experience.

Most of all, what I’ve valued is the people I’ve worked with. The collaboration, professionalism, and shared commitment across the teams have made these 17 years meaningful and enjoyable. I’m proud to have contributed to GMSL and to the role it plays in delivering reliable and efficient scheduling solutions."

"Having spent my first year at GMSL as an Operations Controller, I can genuinely say I’ve grown both professionally and personally. The variety of shifts and tasks means no two days are the same; yet the supportive, relaxed atmosphere makes all the difference. From my very first day, I felt encouraged to take on meaningful responsibility, with colleagues always ready to lend a hand or a cup of tea. That blend of autonomy and team camaraderie is what I value most about working here.

What stands out at GMSL is the balance between professionalism and personality. Even during busy peaks, the energy in the office remains grounded and friendly, and there’s real understanding when it comes to balancing work and life. In the past year, I’ve been able to step up, refine operational practices and build confidence in handling complex tasks; all in an environment where growth and collaboration go hand in hand. I look forward to many more opportunities to learn and contribute within this exceptional team."

"I started at GMSL in 2023, returning to work after a break to raise my girls. I joined as a software tester, with a good amount of experience in testing and business analysis, but a bit out of date with the new technologies and no experience in Gas or Power. I was attracted to GMSL’s testing team because of their value-driven, context-based approach, in which testing is embedded in every part of the process of software development, rather than an afterthought.

Working in a company with so much business knowledge in the operations teams and technical experience in the software teams has meant that I was never far from someone who had any answers I needed. GMSL has fostered a fantastic environment of communication and cooperation that has helped me learn a lot about this complex industry in a relatively short time. As a tester, I have gained a wealth of new skills with automated testing and had the opportunity to observe the tools we’ve created in use by our own operations team, which is a great way to learn about usability and the value we are delivering first-hand. I’ve also been involved in gathering user requirements, answering support queries and even tried my hand at development.

There is always something interesting to find out about, in the business domain as well as the range of technical solutions and test automation tools. The company is great to work for, offering flexibility to work from home and manage my own time, within a friendly team who are all dedicated to producing high quality solutions to real problems.”

"I joined GMSL in May 2024 as a Tester, where I’m responsible for our message routing service Comms, alongside our legacy products. The role inherently has variety, and I welcome that because I like to learn new things. My day-to-day could have me dealing with a new customer’s technical specification, or improving our solution’s resilience to errors, or building on our automated test suite to cover regression and performance testing. All of which require a keen eye and attention to detail, so it certainly keeps me on my toes."

I have grown a lot in that time thanks to the resources on offer, whether that’s reading materials, courses or very approachable (and patient!) colleagues. Our team’s dedicated ‘Innovation days’ help us keep on top of our tech debt so that work is never too bogged down. We are a mix of new and long-serving employees, and no single perspective rules.

GMSL is a great place to learn new things. If there’s a course or an event you think you would benefit from then there is often a way GMSL can support it. I’ve been to the Agile Cambridge conference as an employee of GMSL, and TestBash is next on my list. Across the company we do monthly get togethers at the pub, and the occasional games nights too which are a personal favourite of mine!"

"I joined GMSL in 2025 as a Software Tester for the Power Trak team. My day-to-day responsibilities are dynamic and multifaceted, blending both technical and collaborative tasks. I'm often engaged in exploratory testing, using an investigative approach to discover new issues. I also contribute to write automated tests, identifying and reporting bugs, and collaborating closely with the development and product team to ensure the quality and reliability of our software.

Although I came to this role with little experience in the specific tech stack and domain, I've had a fantastic opportunity to learn quickly. The product is scaling rapidly into new markets and integrating with new platforms, which has meant a steep but rewarding learning curve. I credit my wonderful teammates for creating an environment where I could absorb so much in a short time. I'm excited to continue contributing to our success and learning even more.

Beyond the technical work, what truly makes GMSL a wonderful place is the environment. You see smiles all around, and people are genuinely helpful and friendly. The easy-going culture focuses on effective work rather than unnecessary stress. It's inspiring to see so many colleagues who have built careers here for over a decade—it really is a testament to the positive and stable environment GMSL provides. I look forward to continuing to grow and contribute here."

“During my time at GMSL I’ve worked on many of our products – both customer-facing and in-house – ranging from about 1,000 lines of code to over 1M. We mainly do .NET (C#) development, but there’s bits of everything from VB6 (rarely, thankfully!) to XSL to React, and plenty of other things besides. The software we write is very specialist, which means there’s plenty of scope for thinking outside the box, and for solving problems where you still can’t just ask AI.

It’s a great place to work, with lots of talented and friendly people, mutual trust, and a genuinely relaxed atmosphere. I guess the best endorsement I can give for working at GMSL is that I’m still here after over 15 years – as are various other folk who were already here when I joined!”

"I joined GMSL in 2011 and the gas and power industry was completely new territory for me. It was challenging at times, but the provided training and the team’s support enabled me to quickly become an efficient and knowledgeable operator. In 2016 I became a shift leader, and on top of the usual day-to day operations, I managed my own team, was involved in training, and some client meetings.

Probably one of the biggest challenges when joining was the shift work and long hours. It had its ups and downs – occasionally, I would struggle to stay awake for the last hour or two of the nightshift – but I got used to this fairly quickly and afterwards enjoyed the general flexibility of my work hours. What also made the long hours easier was the amazing atmosphere in the office; everyone is very friendly, there is always time for tea, some cake (or as past experience taught me, a LOT of cake), and a fun conversation.

In 2023, due to a change in my personal circumstances and following the standard interview process, I moved to the software side of the company and became a Product Support Specialist. I was able to utilise my Gas Operations knowledge, as well as the user knowledge of the GMSL software products in this role. I have since expanded on this and am still learning a great deal with regards to the ins and outs of our software, various processes, and software development.

Over the years I have worked at GMSL, I have not only grown on a professional level, but also personal one; ready to take on any challenge, and do so eagerly."