Critical Liquid Cooling
Thermal Mechanical Engineer - Startup

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Critical Liquid Cooling
Critical Liquid Cooling is a growing engineering and business developing innovative liquid cooling solutions. We are looking for a Thermal Mechanical Engineer to join us at an early stage of our growth and develop with the business.
About the Role
This is a broad role, with mechanical design and thermal/fluid engineering at its core, alongside exposure to customers, suppliers, manufacturing, testing, and the wider business.
Why Join a Start-up?
We want to be clear that a start-up is not for everyone. There is less structure than in a large engineering organisation, priorities can change, and there is naturally more uncertainty. You will sometimes need to work things out for yourself and take on responsibilities outside a traditional job description.
The other side of that is the opportunity. You will have exposure to areas of the business that may take years to reach in a larger organisation, with the opportunity to take on responsibility as the company grows. If Critical Liquid Cooling achieves the growth we are targeting, there is significant potential to develop your career alongside the business rather than waiting for opportunities within an established structure.
For the right person, there is the potential for greater responsibility, progression, and reward.
We offer flexible working, structured career development, and the opportunity to grow with the business. As the company develops, there will be opportunities to take on greater responsibility and shape your role. We also intend to offer employee share options, giving you the opportunity to benefit from the success you help create.
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Key Responsibilities
- Mechanical and thermal design of liquid cooling systems
- 3D CAD, engineering drawings, and design development, including pipework and system layouts
- Applying mechanical, thermal, and fluid engineering principles to practical problems
- Working with suppliers and manufacturers to develop and produce components and assemblies
- Supporting customers with technical requirements and system integration
- Helping develop solutions from concept through to installation and operation
- Investigating technical issues and developing practical solutions
- Supporting service visits, installation, commissioning, and maintenance activities where required
- Contributing to engineering processes and ways of working as the business grows
As a small and growing business, the role will also extend beyond engineering. You may be involved in exhibitions, customer meetings, marketing, and other business projects.
If you have an interest in the commercial side of engineering, there will also be opportunities to get involved in sales and business development, including understanding customer requirements, supporting proposals, and developing new opportunities. This is not a requirement, but could suit someone who wants that experience.
Who Would Suit the Role?
We are open to different levels of experience. If you are a graduate with the right engineering fundamentals and mindset, we encourage you to apply. Equally, if you have several years of relevant experience, we are interested in what you could bring.


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We are looking for someone with:
- A degree in Mechanical Engineering or a related discipline
- A good understanding of mechanical engineering fundamentals, particularly heat transfer and fluid mechanics
- Practical CAD experience and an interest in mechanical design and pipework systems
- An analytical approach to solving engineering problems
- An interest in product development, testing, and manufacturing
- Good communication skills and confidence working with customers and suppliers
- An interest in the wider business and willingness to contribute beyond a traditional engineering role
- Willingness to attend customer sites for service, installation, commissioning, and maintenance activities
Experience with liquid cooling, thermal management, cold plates, manifolds, heat exchangers, pipework, or related technologies would be valuable but is not essential.
Other Opportunities
We are also interested in hearing from people with relevant liquid cooling or thermal engineering experience, or individuals who believe they could contribute to the business in another capacity. If you have experience in liquid cooling, thermal management, data centre cooling, cold plates, manifolds, or related technologies, we'd be interested in hearing from you even if this particular role isn't the right fit.
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