Hernando Andrianto Willy Ren is a data analyst based in Sydney, Australia with experience in analysis, visualization, machine learning, and marketing analytics. He has applied techniques like clustering analysis, decision trees, and time series forecasting to projects for retail expansion planning and creditworthiness modeling. Ren also has experience designing A/B tests and analyzing results. He is proficient in tools like Alteryx, Tableau, Python, R, Excel, and Power BI.