Johanna Tomlinson

Johanna Tomlinson, a 2019 Nuffield Scholar from the South Coast of Western Australia, was appointed to the Nuffield Board in 2024. Together with her husband Wayne, she operates a beef cattle enterprise in the region. Johanna holds a Bachelor of Environmental Science (Honours), has completed the Rabobank Executive Development Program, and is a graduate of the Australian Institute of Company Directors (AICD).

Her career includes roles such as Executive Manager of Operations at South Coast NRM, Director of Clear South, and Executive Officer of Fitzgerald Biosphere Group, where she has provided strategic leadership and facilitated investment attraction and delivery for various regional initiatives. Johanna has served on several boards and committees, including Albany Community Financial Services Ltd. (a franchisee of Bendigo Bank) and the Nuffield WA Executive.

She is deeply committed to supporting regional communities, businesses, and community groups, and values collaboration with like-minded professionals.

Board

Nigel Corish

Chair

Nigel Corish

Chair

Nigel Corish, a 2014 Nuffield Scholar from Goondiwindi, QLD, joined the Nuffield Board in 2023. As MD of New Leaf Ag, he farms 4,500ha of cotton, grains, and pulses. A graduate of AICD, he is Vice Chair of Grain Growers Ltd, a director of Cotton Seed Distributors, and Chair of Ability Agriculture.

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.

Ashley Fraser

Ashley is a 2012 Scholar from Rutherglen in North-East Victoria, where he runs a Seed and Grain Equipment business importing and exporting machinery to the seed and grain industries. Ashley has had 30 years’ experience in the broadacre seed industry as managing director of the families seed business Baker Seed Co up until February 2026.

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.

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.

John Woods

Independent Director

John Woods

Independent Director

John is a grain grower based near Goondiwindi on the Queensland–New South Wales border, with extensive experience in broadacre cropping and agribusiness. He currently serves as Chairman of Lawson Grains, one of Australia’s leading corporate grain producers, and brings a strong focus on operational performance, governance and long-term sustainability.

Juanita Hamparsum

Independent Director

Juanita Hamparsum

Independent Director

Juanita is an experienced Non-Executive director with a background in accounting, finance, business strategy and governance, bringing more than three decades of experience across agriculture, corporate Australia and the not-for-profit sector.