Jonathan   was educated as an Agricultural Biochemist, and after studying rumen amino acid metabolism for his PhD, spent 4 years at the University of Cambridge teaching nutrition to medical and veterinary students.  He worked as a nutritionist for a major feed compounder responsible for the nutritional and raw material specifications of all dairy, beef, calf and sheep feeds.  Hewas Technical Secretary for the ‘Feed into Milk’ project and is now Technical Secretary of the Forage Analytical Assurance group which assures the quality of silage analysis in the UK.  Since 1993 he has provided nutritional support to farmers, feed suppliers and compounders.  He began DietCheck with Geoff in 1997.

Geoff   has worked as a ruminant nutritionist since leaving college in 1968 and has a wealth of practical and sales experience including managing a dairy unit for a major compound feed manufacturer. In 1989 Geoff set up his own company to provide technical consultancy, support, and training for a wide range of companies. This included the development of computer feeding models for dairy, beef, and sheep.  He continues to advise individual farmers and companies on all aspects of ruminant nutrition both throughout the UK and beyond.  

Following  Julian's  research at the University of Bristol, where his PhD reviewed MP system and involved checking the ME & MP system in the 1993 UK feeding advisory manual, Julian worked for the UK agricultural advisory service and then a major commercial feed supply company.  He worked with Geoff to develop early computer feeding programs and since 1996 has lived and worked in New Zealand. After seven years with a major New Zealand nutrition company Julian has established his own independent nutritional consultancy.