Theodore Petrou is the founder of Dunder Data and a leading educator in the fields of data science and machine learning. With a deep passion for teaching and a strong command of Python programming, he has authored several influential books, including Master Data Analysis with Python, Master Machine Learning with Python, Master the Fundamentals of Python, and the popular Pandas Cookbook. Through Dunder Data, Theodore has delivered customized corporate training to renowned organizations such as Microsoft, NASA, and the Federal Reserve, equipping thousands of professionals with practical, hands-on expertise.

With a rich background that bridges both industry and academia, Theodore brings a wealth of experience to his teaching. His career has included roles as a Quantitative Developer, Lead Data Scientist, and Credit Risk Professional, where he solved complex problems in predictive modeling, financial analytics, and data strategy. Alongside developing innovative technical solutions, he has devoted much of his career to mentorship and education, fostering a deep and lasting understanding of data science principles.

Theodore’s teaching extends beyond corporate settings into the broader educational community through live courses and workshops. Known for his clear, engaging style, he breaks down sophisticated concepts in Python and data science to make them accessible and actionable for learners of all levels. His mission is to guide aspiring and experienced professionals alike through the intricacies of data analysis and machine learning with clarity, enthusiasm, and real-world relevance.