About us

Our Team

Duncan Mc Donald

0438 428 607


Duncan is the sole Director and CEO of the company and Vice President of the Australian Water Brokers Association, having also served two terms as President. He comes to National Water Brokers with over 30 years’ experience in the conveyancing industry, 25 years of that as a partner or proprietor of conveyancing practices.

Duncan brings a wealth of experience to the team. His qualifications include a Bachelor of Arts (Geography) a Graduate Diploma in Property and he is completing a Bachelor of Laws.

He wrote elements of the conveyancing course at the University of South Australia and was an active member of the Australian Institute of Conveyancers (SA) Inc. for 25 years. His work as a Conveyancer has seen him gain substantial experience in the development and negotiation of major projects with a strong focus on liaison with project principals, contractors, public boards and trustees.

He has also owned irrigated vineyards in McLaren Vale and developed first hand an understanding of how important water is in the agricultural sector.

Jan Nelson

(02) 800 800 84


Jan is an integral member of National Water Brokers Administration. She ensures our National Water Brokers clients are looked after with the utmost care from the initial Sale or Purchase through Invoicing and Documentation to lodgement and Settlement.

Jan is meticulous with a sharp eye for detail and she will ensure your transactions occur in the quickest possible time frame. Jan has a passion for the industry and for people, delivering your water transaction with enthusiasm and genuine care.

Prior to commencing with National Water Brokers, Jan was a part of a highly successful Real Estate Team for 12 years having won multiple awards within the industry. She was also a Nurse and Midwife for 26 years which enables her to relate to all people, in all circumstances.

Mark Witter

0403 461 669


Mark Witter joined National Water Brokers after running his own carpentry business for most of his working life.He therefore has an extensive background in business, business transactions & relating with his clients.

He loves all types of sports and makes soccer his passion, espescially Adelaide United Football Club, where he has a very close association.

Since beginning with National Water Brokers his knowledge has progeressed quickly, with many major transactions in the last 12 months.

He is only a phone call away if you would like to discuss any part of the national water industry.

Nathan Smith



Chris Ireland



Macgregor Greer

0418 808 136


Macgregor is the former Managing Director of National Water Brokers. His brainchild, National Water Brokers was born in September 2012 and has gone from strength to strength ever since.

After taking on a new CEO in January 2013, Mac moved the company  closer to making National Water Brokers one of the country’s leading brokers. In August 2020, Mac sold his interest in National Water Brokers to the CEO, Duncan McDonald and now works in a consultative role with the Company.

Thank you again for choosing to conduct your water transactions through National Water Brokers. Our aim is to make your water trades as simple, cost effective and efficient as possible

Call our Office anytime on

02 800 800 84