Jessica Middlemiss hired to help deliver cutting edge technology
October, 2024
Puraffinity, which develops precision technologies to remove toxic “forever chemicals” perfluoroalkyl and polyfluoroalkyl substances (PFAS) from water, has appointed Jessica Middlemiss as Chief Technology Officer.
Jessica joins from Matter, an environmentally focussed startup which develops technology to remove micro-scale pollution from water. Prior to Matter, Jesscia was Head of Plastics Technology at Sartorius and spent ten years at Dyson including two years as Head of Operations for The Dyson Institute – Dyson’s in-house undergraduate degree-apprenticeship programme.
“Jessica has a really broad technical and business network across both industry and academia which is valuable to us,” said Puraffinity co-founder Henrik Hagemann. “Jessica brings relevant start-up experience from her time at Matter, leading a large team of scientists at Sartorius and held a variety of engineering and management positions at Dyson. We are delighted to have her join us.”
“I believe I have the combination of technical understanding and people skills which will help Puraffinity flourish,” said Jessica. “I have built my career on an ability to bring together exceptional technical people to work on clear and targeted challenges as a team. I know how to get people motivated and focussed on a common goal that delivers commercially for the organisation.”
Jessica has a Masters in materials science and engineering from Imperial College London and is a Fellow of the Institute of Materials Minerals and Mining (IOM3).
Puraffinity is pleased to announce that its G400+ adsorbent media has been certified to NSF/ANSI/CAN 61 and NSF/ANSI/CAN 372 standards for Point of Entry (POE) and Water Treatment Plant End Use applications The certifications confirm that G400+ meets the required health effects criteria for materials used in drinking water system components. This milestone enables Puraffinity to support installations where NSF-certified products are required, including municipal drinking water applications. “As a member of the American Water Works Association (AWWA), I see this certification as an important step for broader municipal adoption, ” said Neal Megonnell, Chief Commercial Officer at Puraffinity. “It enables utilities to deploy our technology where NSF compliance is required, and it strengthens our ability to scale PFAS treatment solutions while maintaining the highest standards of safety and performance.” Designed for highly effective PFAS removal with rapid kinetics, the advanced adsorbent media G400+ supports compact system design and efficient treatment across a wide range of water matrices. Building on this milestone, the company continues to advance water treatment solutions that help utilities and industry address PFAS compliance and protect drinking water quality.
Puraffinity partners with the U.S. Army ERDC to evaluate Puratech G400, an advanced adsorbent for PFAS removal, through lab and field trials comparing its performance and cost-effectiveness to existing PFAS treatment technologies
Puraffinity signs first commercial agreement for full-scale deployment of its PFAS removal technology
An exclusive panel featuring Puraffinity CEO Vincent Caillaud, who will join industry leaders to discuss cutting-edge solutions for combatting PFAS, “forever chemicals”, in drinking water. With PFAS contamination presenting urgent health challenges due to their extreme persistence, mobility, and health impacts at trace levels, this session will spotlight the realities of PFAS in water supplies, the latest science driving regulatory change, and the next generation of removal technologies.
WEFTEC 2025 is the world’s largest annual water quality conference and exhibition, held September 27–October 1, 2025, at McCormick Place in Chicago. It gathers over 20,000 water professionals from 100+ countries to explore cutting-edge water technologies, attend technical sessions and workshops, and network with sector leaders. The event features a massive exhibition of advanced solutions, educational opportunities, and speciality pavilions focused on topics like sustainability and digital innovation. Our CEO, Vincent Caillaud , and CCO, Neal Megonnell , will be in attendance.
In the Building World-Class Teams webinar series, Henrik Hagemann and Jessica Middlesmiss will be discussing how to Create Cultures that Scale