Qualified as a veterinary surgeon from the University of Bristol in 1998.
Worked as a veterinary assistant in SW England 6 years.
Joined Prof Andrew Bradley and Prof Martin Green as PhD student working on a national dairy cow mastitis research project 2004-2009.
Worked for laboratory consultancy company called QMMS Ltd in SW England between 2006 and 2019.
Worked in dairy cattle practice Glastonbury between 2006 and 2023.
Joined Nottingham Veterinary School 2009 – present day – teaching dairy herd health.  (https://www.nottingham.ac.uk/vet/people/james.breen)
Joined Map of Ag concultancy group 2019 – present day - working with supply chain as well as dairy farms and veterinary surgeons in practice (https://mapof.ag/team-member/james-breen/).