3D Systems Corporation’s Andrew Johnson has fond memories of a summer spent touring the country with a multiact music festival. No, the now general counsel wasn’t in a band. He did promotional work for a record label asso­ciated with the tour, managing its on-the-road music store and sharing new music with fans. "Back then, it was all CDs," says the 38-year-old Johnson.

The only constant truly is change, and nobody knows that better than Johnson. Before becoming assistant general counsel for 3D Systems in 2006, he was doing mortgage-backed securitization work with Hunton & Williams.