The engine room of our business.

RDA have a team of experts to make your business work more efficiently, and to help you protect and invest your rewards.

Learn more about our team below.

If you are interested in joining the RDA team, we would love to hear from you. See our Careers page for more detail.

Nathan Davies


As a qualified CPA and registered tax agent, Nathan has extensive expertise in all areas of accounting, but is also a highly skilled communicator. Nathan can break down complex matters and provide guidance and support in terms that are easily understood and inspire confidence. Nathan is an expert in change management, and has delivered hands-on strategic and commercial advice for major business evolution such as start-ups, acquisitions, restructures and business sales. A passion for getting to know a business allows Nathan to identify and facilitate improvements through systems, technology and people. Nathan also has extensive experience in Estate planning and a background in Commercial and Contract Law.

Selina Liu


Selina has the knowledge and experience to find the optimal outcome for every client she works with. Selina applies the same rigour and discipline to accounting as she did to her 8 years of studying and practising Medicine. Selina’s tax knowledge is exemplary, and as a qualified CPA, Fellow Member of the Tax Institute of Australia, and Xero Certified Advisor, Selina has applied her skills across a number of industries including property development, self-managed super funds, hospitality, motor vehicles, insurance, real estate, advertising, manufacturing, construction, medical, agriculture, viticulture and not-for-profit organisations. Supporting clients who run small to medium businesses along a journey to growth and financial freedom is something that Selina believes in, and is very good at.

Rick Davies


Rick graduated from University of Adelaide majoring in Economics in 1977 and is a Fellow Member of CPA Australia and Registered Tax Agent.

Rick founded Rick Davies & Associates in 1980 adding a branch office in the Riverland town of Barmera, South Australia, in 1984. He has long held the belief that trust and rapport between client and advisor results in clients making more informed decisions in the planning stages which will, in turn, see clients benefit at tax return time. The practice continues this mantra.

Cassandra Sorby-Adams

Senior Financial Adviser

Cassandra has well over a decade of experience in wealth management, with a Diploma of Financial Services (Financial Planning), and an Advanced Diploma of Financial Services. Cassandra is a member of the Association of Financial Advisers.

Throughout her career, Cassandra has gained a broad range of experience and has dedicated herself to helping her clients achieve their personal and financial goals. One of Cassandra’s particular passions is risk insurance: she takes great satisfaction in ensuring her client’s wealth is protected no matter what life may throw at them.

In Cassandra’s spare time, she loves to host family and friends. Having spent many years running restaurants in both Australia and Europe, including a Michelin star restaurant in London, she loves to cook and entertain.

Brad Watts

Brad Watts


Based in Adelaide, Brad brings youth and energy to the RDA team. Over his dynamic career, Brad has noticed first-hand a rapid change in how businesses use technology to make better decisions, achieve more efficient outcomes and make our lives easier. Brad brings his tech savvy thinking to the table when it comes to recommending the best solutions for clients, based on their individual business needs. And he can explain what is required in simple terms, with great patience! Brad is a qualified CA and has experience across industries such as financial services, property development, agriculture, medical & trade.

Fiona Rui


Fiona became an accountant at the RDA Adelaide office in January 2018, after demonstrated outstanding commitment and dedication during her internship with us. She graduated from the University of Adelaide with a Masters Degree of Accounting and Marketing. Fiona continues to develop knowledge in accounting software and processes as well as regulatory reporting and general tax accounting. Fiona’s Chinese background underpins her willingness to help new immigrants or overseas investors understand requirements here in Australia.

Adrienne Dawson


Adrienne has been in the Financial Services industry since 2006 and has a Diploma of Financial Services and a Diploma of Counselling. Her vast experience ranges from administration and client services to practice management. Adrienne is based in Adelaide with Cassandra, in the Wealth Management team and has a passion for working with people and helping them to achieve their goals. In Adrienne’s spare time she is a mum and loves cooking up a storm.
diana winnell

Diana Winnell


Diana has many years of experience in accounting administration, as well as administration of many other types of businesses. Diana will be your first point of contact at RDA Melbourne and understands the importance of being across the detail of every client’s particular needs.