Meet the team

Adam McMaster

Adam McMaster


Adam is a highly skilled Chartered Accountant and Registered Tax Agent with a wealth of experience in the accounting and taxation industries. As the director of Cornerstone Accounting Services (TAS), he is dedicated to helping clients achieve their financial and lifestyle goals by utilizing his expertise in accounting, tax, audit, and business services.

Throughout his career, Adam has worked with clients from a wide range of industries and at all levels of business, providing expert advice and guidance on financial matters. He has a true passion for business and tax, and takes great pride in supporting clients in achieving their financial goals.

In his free time, Adam is a fitness enthusiast and can often be found hitting the gym. He also enjoys spending time with his wife Kartika, and supporting his favourite AFL team, the Brisbane Lions.

Lucky Wijesundara

Lucky Wijesundara


Lucky is a highly motivated and driven individual with a passion for finance and accounting. As a valuable team member of our practice since May 2022, Lucky brings a wealth of knowledge and expertise to our team.

With a background in Mortgage Brokering in Melbourne, Lucky has gained valuable experience in the finance industry, which he is now utilising to provide the best service possible to our clients. His knowledge of the mortgage industry has been an asset to our team, as he has helped many clients make informed decisions about their financial goals.

In addition to his current role at our practice, Lucky is also studying the CPA program. His dedication to his education and professional growth is a testament to his commitment to excellence. Lucky is always looking for ways to enhance his knowledge and skills, so he can deliver the best possible outcomes to our clients.

We are lucky to have Lucky as part of our team and are excited to see his career progress with us. His hard work and determination are an inspiration to us all, and we look forward to seeing what he will achieve in the future.

In his free time, Lucky loves to watch movies, providing him with a much-needed break from his busy work schedule. Trust us he knows a good film when he sees one!

Sharon Armstrong

Sharon Armstrong

Client Services Officer

Sharon brings a wealth of experience to Cornerstone and really understands customer service.  She owns an award winning tourism business and has worked in finance positions in both the public and private sector for many years.

Sharon’s goal is to ensure you are completely satisfied with your Cornerstone experience.

Sharon holds a Graduate Certificate in Tourism, Environment and Cultural Heritage from UTAS and a Diploma of Management.

Now happily living in the Southern Tasmanian countryside, Sharon has a menagerie of animals – horses, cats, birds, goats and a scene-stealing cattle dog called Gracie.

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