生物

Jan-Karel Pieterse is a longstanding expert in Excel and one of the world's leading experts in VBA. Jan Karel not only features in a video, he is also responsible for writing much of the course content and closely collaborated with us every step of the way. He is the lead instructor, with an abundance of experience in the Excel world. Trainer, Modeller, Auditor, and VBA Developer, he understands Excel inside and out.