Marcellinus Aditya Witarsah is a skilled Data Scientist with experience at Orang Tua Group, where research focuses on time series forecasting methods for retail product demand. Prior experience at DANA Indonesia involved implementing advanced techniques for identifying fraudulent users from KYC records, successfully detecting around 2200 fraud cases, and developing a trend analysis dashboard for customer complaints. Additionally, Marcellinus was a Machine Learning Path Student at Bangkit Academy, where leadership of a team resulted in the creation of a vehicle payment system and development of an object detection model with high precision metrics. Marcellinus holds a Bachelor's degree in Informatics from Universitas Pelita Harapan.