Øystein Ulvestad has a master in structural engineering. He started working in 2001 and very early on took an interest in 3d-modelling. In his ten first years he specialized in design of heavy industry steel structures. Following a childhood fascination of bridges, he changed direction and has spent the past 8 years worked with ways of optimizing 3d-bridge BIM-models. His work has for the last 4 years encompassed making workflows for designing and building bridges without drawings, but solely based on BIM-models. Two years ago, his team finished the first model based concrete bridge in the world. At the moment, he is responsible for BIM-models on Randselva bridge, Norway: A 634-meter-long cantilever concrete bridge being built without drawings, solely based on BIM-models.