Andrew graduated with a Bachelor of Science in Finance and an MBA from California State University. He earned his PhD in finance from the University of Science and Technology of China.
​In 2013, Andrew retired from a 20-year career as an equity analyst at various brokers in Thailand to set up A. Stotz Investment Research (ASIR). His final eight years in the business were spent as a Head of Research, managing teams, and writing strategy regularly. He served two terms as CFA Society Thailand president.
​While Head of Research at CLSA, Andrew was voted No. 1 Analyst in Thailand in the Asiamoney Brokers Polls for 2008 and 2009. He was also voted No. 1 Analyst in Thailand in the 2009 Institutional Investor magazine All-Asia Research Team Report.​
Andrew and Sornsak have been a team for the past two decades.