Hans Kellner is a Senior Principal Engineer within Autodesk Research and has 30+ years of experience designing and implementing software.  He has researched and developed various alternative input devices and his natural user interface (NUI) research has been prominently featured in the Autodesk Gallery, Autodesk University, Autodesk Technical Summit, Microsoft Professional Developers Conference, and other venues.  He is currently researching the use of emerging technologies and how they intersect with our customers and our products. When not focused on work, Hans may be found riding his mountain bike, hiking, or backcountry skiing.