Your Coaches
Program Coaches

U-Shin Buechelhofer-Kim
Tech Founder · Coach · Communication Strategist
Former NYC actor and Hollywood talent agent, now based in Vienna. U-Shin spent four years figuring out how ViennaUP actually works, not from the stage but from the room, showing up alone, getting it wrong, and eventually getting it right. He founded Office Spiel to bring performance, presence, and human connection into the founder world. PrepUP is everything he learned, built into one program so you do not need four years to figure it out yourself. www.pitchtastic.eu

Aaron Windfield
Startup Coach & Creative Strategist
Aaron is a 2x Techstars entrepreneur with one exit, one invaluable failure, and products used by over 450 million people. He has built and advised companies across music tech, mental health, and creative tech, and negotiated deals with SoundCloud, Nestlé, and Tiffany & Co. He built Morning Sloth because founders need more than strategy. They need accountability, momentum, and someone who has been in the room and knows what it actually takes. That is what he brings to PrepUP. www.kemiconnect.com

Leonhard Pessl
Organizational Developer · Leadership Coach · Morning Sloth
Leo has spent a decade helping people figure out where they are and where they want to go. His focus is how people grow inside startups, and his mission is bringing joy into professional life. He joins PrepUP because founders do their best work when they are moving with clarity, not anxiety. That is exactly what he helps with. Also known for misplaced jokes in professional settings. You have been warned. https://startup.morningsloth.com/

Kasia Sadowska
AI Product Engineer · Startup Mentor · FutureHabits.Tech
Kasia helps founders turn ideas into working products, fast. She works with founders, innovation teams, and accelerator programs across fintech, sustainability, travel, and manufacturing. Her approach is practical: structured product thinking, modern AI tools, and hands-on execution. Ship early, learn fast, build things that actually work. She joins PrepUP to help you turn your story into something you can show people before ViennaUP even begins. https://futurehabits.tech/

Toma Molerov
Coach · Author · Community Builder
Toma helps ambitious people get out of their own way and show up as themselves in the room. Not a polished version. Just you. He has worked with more than 125 individuals and teams, written 5 books including an international bestseller, and built programs reaching over 6,000 students. He knows what it takes to walk into a room full of strangers and make it feel like yours. That is exactly what he is going to help you do. https://tomamolerov.com/