Dean is the managing director of Brooks Spreading.

Dean has a background working on farms and in the transport industry as a driver and dispatcher. In 2003 he decided he wanted to do something for himself so he started Brooks Bros Spreading Contractors with his younger brother Jason. In 2009 Dean & Sarah bought Jason out of the business and changed the name to Brooks Spreading.

Dean is passionate about the ground spread industry and has been involved with the Fertiliser Quality Council, driver training for spreader operators, a national councillor, Vice President and President of the New Zealand Groundspread Fertiliser Association and in July 2021 was awarded a life membership of the New Zealand Groundspread Association for his contribution.