Our Company
Built on a century of heat transfer expertise, trusted across the world’s most critical industries.
We combine proven engineering with cutting-edge manufacturing and a nuclear safety culture that shapes everything we do.
Our most advanced facility yet, built to deliver at global scale.
From our headquarters in Sheffield, UK, we support customers worldwide through a network of trusted partners and agents, delivering specialist heat transfer solutions where performance, reliability and assurance matter most.

Serving critical industries
Defence, nuclear power, conventional power, petrochemical, oil & gas and energy storage.
Global installed base
Equipment operating across Europe, North America, the Middle East and beyond.
Nuclear cooling heritage
Decades of pioneering OEM cooling solutions for turbine island systems and associated machine cooling applications.
A legacy in heat transfer, dating back to the early 1900s.
The people behind the performance
Behind every solution is a team of engineers, specialists and problem solvers, bringing deep expertise and a shared commitment to delivering when it matters most.
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Rob Sawtell
Managing Director
Rob Sawtell
Managing Director
With more than 30 years in the heat exchanger industry, Rob is a co-founder of Therco Serck and a driving force behind its strategic direction. He pairs a solid engineering foundation with strong commercial acumen and naturally confident leadership. Rob’s deep market insight, cross-functional expertise, and extensive professional network enable him to lead decisively and position the organisation for continued growth.
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Danny Speke
General Manager
Danny Speke
General Manager
Danny’s wide-ranging experience across health and safety, production operations, and quality assurance is refl ected in his extensive professional qualifi cations, including NEBOSH, CSWIP, MT, PT & RI (PCN Level II), Radiation Protection Supervision, and Lead Auditor (CQI & IRCA Certifi ed). Combined with his instinctively proactive, dynamic, and customer-centric approach, Danny is the ideal leader for our UK operations. -

Azman Aminuddin
Engineering Manager
Azman Aminuddin
Engineering Manager
Azman has a BSc in Mechanical Engineering, an MSc in Systems Engineering, and more than twenty years of experience designing air-cooled and tubular heat exchangers. Quiet by nature but confi dently assertive, he combines a phenomenal work rate with meticulous attention to detail, which makes him a highly valued and trusted member of the team.
Engineered to deliver when it matters
Whether you’re a client, partner or supplier, we focus on what performs in the real world, not just on paper.












