We bridge the gap between science and supply, bringing researchers closer to the tools and expertise they need to make discoveries happen.
The Story of Caltag
Simplifying scientific sourcing since 2001.
Caltag Medsystems Ltd was founded in February 2001 by Dr Tim Almond, beginning operations with a base in Silverstone, UK. Built on the commitment to supporting life science research through high-quality reagents and responsive service, we quickly grew into a trusted partner for researchers across the UK and Ireland.
In 2009, Caltag Medsystems relocated to our current site in Buckingham, to allow for laboratory facilities & the launch of our manufacturing division, Cytomark, which produces specialist reagents for flow cytometry, including the cell stabilisation reagent TransFix®. This marked an exciting new phase, combining scientific expertise in both sourcing and manufacturing under one roof.
Our company continued to strengthen, achieving our first ISO 13485 certification in 2013 and securing FDA clearance in 2017 for the Transfix/EDTA Vacuum Blood Collection Tube (TVT-03-50-US) for in vitro diagnostic use in the United States. In 2018, Caltag was awarded a Human Tissue Authority (HTA) license, enabling the storage of human tissue products in our liquid nitrogen tanks. This means we can maintain the temperature-sensitive integrity of these products whilst we process orders for dispatch.
Most recently, in 2025, Caltag Medsystems and Cytomark were fully unified under the Caltag name in a company-wide restructure to become an employee-owned trust, as well as subsequent rebranding. This transition reflects our continued focus on simplicity and delivering a seamless experience for our customers.
Today, Caltag continues to support scientists across academia, biotech, and pharma by offering globally sourced & trusted reagents and expert guidance from a genuinely approachable team.
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2001
Caltag Medsystems was founded by Dr Tim Almond and begun its operation in Silverstone, UK.
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2009
Caltag Medsystems relocated to Buckingham, signalling the beginning of Cytomark, a manufacturer of flow cytometry reagents, including TransFix®
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2013
The company continued to grow and strengthen, achieving its first ISO 13485 certification.
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2018
We were awarded a Human Tissue Authority (HTA) license to enable the storage of human tissue products on our premises.
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2025
Caltag Medsystems and Cytomark underwent a restructure, becoming an employee-owned trust and a rebrand, creating Caltag – a single entity that sources and manufactures life science reagents.
Dr Tim Almond
CEO
I'm often found engaging in my passion for diving which takes me all over the world.
Dean Coupar
Managing Director
I'm in charge of keeping everything operating smoothly.
Maria Williams
Finance Manager
Camilla Brown
Customer Support Team Manager
I am a huge nature lover and enjoy nothing more than going on long walks with my two dogs.
Nicki Woodham
Chief Scientific Officer
My background is in clinical immunology and product development.
Supporting Science with Integrity
Quality by Routine
We're committed to providing products and services that meet the highest standards of quality, safety, and reliability. Our processes are built with precision and compliance in mind, ensuring you can trust what you receive.
- ISO 13485 Certified - the international standard for quality management in medical devices and diagnostics.
- Risk Management and Product Safety - proactively identify, assess and manage all risks throughout the product life cycle to guarantee product quality and customer safety.
- Dedicated Quality Team – continuously improving our Quality Management System, ensuring traceability, accurate documentation and ongoing compliance across all operations.
Ethical by Nature
At Caltag, we take ethical sourcing seriously, not just as a requirement but a responsibility. When handling human and animal-derived materials, operating under strict ethical guidelines is of the utmost importance. That's why we work with partners who meet our standards for consent, documentation and regulatory compliance.
- Human Tissue Authority (HTA) Licensed - authorised to store, process, and procure human tissue in the UK.
- Complete Service for CITES Products - we carry out the whole process, so you don't have to. Acquiring import and export licenses, liaising with the Animal and Plant Health Agency (APHA), and coordinating with special couriers.
- Fully Traceable Sourcing - all our samples and reagents comply with ethical and legal requirements.
Sustainable by Choice
Sustainability isn't just essential for the future of science but the world in which it happens. Here at Caltag, our Green Initiative highlights our commitment to reducing our environmental impact by making considered choices in our daily operations, partnerships and logistics.
- Paperless Workflows - we prioritise digital systems to reduce waste.
- Tech Usage - from hyperlinks in emails to regular inbox clear-outs, we aim to reduce our data consumption.
- Strong Recycling Initiative – using soft plastic, mixed plastic, food waste, ink cartridges and general recycling bins.
- Carefully Selected Supplies - from buying in bulk to reduce CO2 emissions from transport vehicles to buying refillable hand soap and washing up liquid to reduce our plastic waste.
Join our team
We're a cross-disciplinary team that loves to create great experiences for our customers.
No current vacancies
Contact Us
Our friendly Customer Support Team is ready to help. If you can't find what you're looking for, let us know and we will do the hard work for you.
- Sales and Customer Support: office@caltag.co.uk
- Accounts: accounts@caltag.co.uk
- UK: +44 (0)1280 827460
- Freephone: 0800 279 9113
You could also try our chat feature to get in touch immediately.