Crispo Mwangi is a globally recognized Microsoft Most Valuable Professional (MVP) in Excel, Excel Book Author, a Microsoft Certified Trainer (MCT), and a leading authority in data management and business analytics. With years of hands-on experience delivering training to diverse audiences across industries, Crispo has helped thousands of professionals unlock the full potential of Excel, Power Query, and other Microsoft tools to solve complex business challenges. Currently, Crispo serves as an Excel Trainer and Consultant, delivering both in-person and online programs that combine deep technical expertise with practical, results-driven learning. He is also the founder and host of the East, Central, and South Africa Online Excel Group, where he leads weekly Excel challenges and fosters a thriving community of analytics professionals. In addition to his training work, Crispo is a sought-after webinar speaker and content creator, producing thought-provoking sessions on topics such as advanced Excel formulas, data automation with VBA, Power Query transformations, and the integration of AI tools like ChatGPT into data workflows. His style blends meticulous clarity with a warm, engaging delivery that empowers learners to apply their skills immediately.