About us

Our Team

Front Row (L-R) John Vincent, Jan Nelson and Duncan McDonald
Back Row (L-R) Allan Sutherland, Macgregor Greer, Mark Witter

Duncan McDonald

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) and a Graduate Diploma in Property and he is currently 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. (and a little camera shy!) 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.

Jan will continue the outstanding service you have come to trust from the National Water Brokers Team and is only a phone call away should you have any concerns or would like to discuss any part of the water sales to settlement process.


Allan Sutherland



Allan is courteous, honest, reliable and a willing listener.
He has an extensive background in business & business transactions over 35 Years & loves helping people solve their individual water requirements.

He has just retired as a Club Cricket Coach which he attended passionately for over 6 years in Adelaide & Regional South Australia.
He enjoys all sports but is an avid cricket and AFL follower.

His main passion is helping people whether it is family, friends, work colleagues or clients.

Let Allan help you with the challenges the water industry provides and
“Let’s get ahead of the game.”

Macgregor Greer

0418 808 136


Macgregor is the former Managing Director of National Water Brokers. After 6 years as a Senior Broker with one of Australia’s leading brokerage firms, Mac could see there were opportunities to better service his key clients.

His brainchild, National Water Brokers was born in September 2012 and ten years on has gone from strength to strength.

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. He is also a member of the Australian Water Brokers Association.

John Vincent

0418 808 136


John is one of the newer members to the National Water Brokers team.

After spending almost 25 years at Mitsubishi Motors, starting on the assembly line and moving into Administration in various IT roles. Other roles followed before joining us in June 2020.

His passion for helping people with their water issues is something that drives John to obtaining the best and fairest outcome for their water.

From running raffles to raise funds helping kids, clubs and charities for 14 years, to now working with people and their water is something that John enjoys.

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