![](/IMAGES/Board/Nigel Corish.jpg?width=600)
Nigel Corish
Nigel is a 2014 Scholar from Goondiwindi, QLD and was appointed to the Nuffield Board in September 2023. A fourth-generation food and fibre producer, Nigel is MD of New Leaf Ag Pty Ltd producing cotton, wheat, barley, chickpeas and sorghum across 4500ha. A graduate of the Australian Institute of Company Directors (AICD), Nigel is currently serving as Vice Chair of the board of Grain Growers Limited and is also a director of Cotton Seed Distributors. Nigel serves as Chair of Ability Agriculture, which is a charity aiming to increase awareness, support, representation and opportunity for people with disabilities in agriculture. In addition, Nigel is a former State Chair of the Queensland Nuffield State Committee.
Board
![](/IMAGES/Board/Rob Bradley.jpg?width=800&filter=greyscale)
Rob Bradley
Rob Bradley
Rob Bradley, a 2009 Nuffield Scholar, runs Bradley Agriculture in Tasmania, managing dairy, lamb, and irrigated cropping, and is a partner in a NSW broadacre farm. He serves on the Cressy Longford Irrigation Scheme, Toosey Aged Care, and Dairy Farm Management Business boards.
![](/IMAGES/Board/Don Madden.webp?width=800&filter=greyscale)
Don Madden
Don Madden
Don Madden, a 2010 Nuffield Scholar, is co-owner and director of Smithfield Cattle Company, overseeing lot feeding, exports, logistics, and property management. A former QLD State Chair, he has shaped industry strategy through ALFA and pioneered the feedlot sector’s first Trainee Manager program.
![](/IMAGES/Board/Guy Hebblewhite.png?width=800&filter=greyscale)
Guy Hebblewhite
Guy Hebblewhite
Guy Hebblewhite, a 2013 Nuffield Scholar, joined the Nuffield Australia Board in 2024. He previously chaired Nuffield NSW and helped deliver the 2022 Tamworth National Conference. Formerly in chicken meat and Wagyu production, he is now developing an agri-marketplace and has held leadership roles in AgriFutures and ACGC.
![](/IMAGES/Board/Kara Knudsen.webp?width=800&filter=greyscale)
Kara Knudsen
Kara Knudsen
Kara Knudsen, a 2013 Nuffield Scholar from Mundubbera, QLD, runs a beef enterprise and is passionate about Australian agriculture. She has held key Nuffield volunteer roles in sponsorship, strategy, and events. Kara has shaped the beef industry through policy work, industry reviews, and leadership programs like AICD and WCF Agribusiness.
![](/IMAGES/Board/Johanna Tomlinson.webp?width=800&filter=greyscale)
Johanna Tomlinson
Johanna Tomlinson
Johanna Tomlinson, a 2019 Nuffield Scholar from WA’s South Coast, joined the Nuffield Board in 2024. She runs a beef enterprise with her husband and has held leadership roles in NRM, biosphere initiatives, and regional investment. A graduate of AICD and Rabobank EDP, she is dedicated to strengthening regional communities.
![](/IMAGES/Board/ Donald McGauchie.jpg?width=800&filter=greyscale)
Donald McGauchie, AO
Donald McGauchie, AO
Donald McGauchie was appointed to the Nuffield Board in 2013 as a special skills external Director. He is Chairman of Nufarm Limited, AACo, and AWTA, with past roles including Chairman of Telstra and the Victorian Rural Finance Corporation. A former NFF President and Reserve Bank Board member, he was named Rabobank Agribusiness Leader of the Year in 2001 and awarded the Centenary Medal. In 2004, he was appointed an Officer of the Order of Australia.