Dr John Roche is a globally recognised expert in agricultural science and was appointed Chief Science Advisor to New Zealand Prime Minister Christopher Luxon in May 2025.

He also serves as Deputy Chair of the Prime Minister’s Science and Technology Advisory Council, which was established to guide the government on key scientific priorities and challenges.

Dr Roche grew up on a dairy farm in Castleisland, Ireland, where his early experiences shaped his passion for agricultural innovation and sustainability. He holds an Honours degree in Animal Science, a Master’s in Farm Systems and Pasture Management, and a PhD in Animal Nutrition. His academic and professional career spans Ireland, Australia, and New Zealand, with a focus on advancing sustainable farming practices and improving agricultural productivity.

Dr Roche has also served as Chief Science Adviser at the Ministry for Primary Industries (MPI) since 2018, a role he continues on a part time basis. At MPI, he led the organisation’s science forum, chaired the science governance group, and oversaw the independent Mycoplasma bovis Strategic Science Advisory Group. He also contributed to the Prime Minister’s Chief Science Advisor’s Forum and held an adjunct professorship at the University of Auckland’s School of Biological Sciences.

Dr Roche’s previous roles include Principal Scientist for Animal Science at DairyNZ, where he worked on innovative solutions to enhance the dairy sector’s sustainability and resilience. His expertise in animal nutrition, farm systems, and pasture management has made him a trusted advisor in both scientific and policy circles.