Wurlitzer Co

Kurt Wurlitzer's company, Wurlitzer Co, was in charge of a massive construction project on Quotron at the time that Wurlitzer's son, Jason, was held for ransom by dwarfs. "Director of Works" was printed on a plaque near where the Second Doctor was brought to meet with Mr Wurlitzer. (COMIC: Operation Wurlitzer)

Behind the scenes
It is unclear whether the "Co" in "Wurlitzer Co" stands for Corporation, Company or Construction, as the remainder of the name, if it exists, is out of frame the one time it's shown.