Professional Development Workshop

I have to give a 15 min presentation on a professional development workshop: Topic: You've been asked to put together an idea for a professional development workshop for our office and pitch your idea to the team. What process would you use to select a topic and how would you work with others in implementing/planning the workshop/event, gaining buy-in, and collaborating with others? In 15 minutes, share 1. your process for implementation and planning and 2. your pitch to the office for your idea. Note- you don't need to be the subject matter expert on the actual topic, just the person planning and organizing the event.