Dr Philip Cater
Director of Operations

Phil came to Leaf Expression Systems (LES) from BTG plc, where over a period of six years, he held several Director of Operations posts with responsibility for end to end supply chain, full P&L for global Specialty Pharmaceuticals and, originally, a biological products manufacturing facility. Prior to a short stint at Baxter Healthcare, Phil spent seven years commissioning, validating and then managing a new £16 million API production facility for Genzyme Ltd in Haverhill. Phil is a Chartered Member of the Royal Society of Chemistry.

Dr Nicholas Holton
Process Development Manager

Nick graduated from the University of Otago with a PhD in Biochemistry. He has extensive postdoctoral experience working on the biochemistry and function of plant membrane receptors and has also worked for many years with Agrobacterium and Nicotiana species. Nick joined Leaf Expression Systems in February 2017.


Dr Franziska Kellner
Plant Research Scientist

Franziska graduated with a degree in Horticulture from the HTW Dresden (Germany) and has obtained a PhD in Biochemistry from the University of East Anglia / John Innes Centre, Norwich. She gained skills in both academic and industrial plant research environments having extensive experience in plant genetics, microbiology and crop plant research. Franziska joined LES in January 2017.

Dr Marek Zarzycki
Process Development Scientist

This is whMarek’s PhD is in biology investigating protein structure-function relationship in the regulation of muscle metabolism. He specialises in process development for antibodies used in research, diagnostics and therapeutics, protein chemistry: purification, conjugation and analysis of monoclonal antibodies, assay development and molecular diagnostics. Marek joined LES in June 2017.

Rebecca Holland
Senior Support Assistant

Becca joined LES in November 2016 having been on the Norwich Research Park at the John Innes Centre for 7 years working in Business Development and External Relations. She was involved in the very early stages of the initiation of the Leaf Expression Systems project in a supporting admin role. Becca has worked in the NHS and commercial sectors and has over 25 years working as a PA at Board level.