Tell your friend to figure out how to bring his own internet into work. Turn his phone into a usb-hotspot and plug it into his work computer or bring in his ow

Tell your friend to figure out how to bring his own internet into work. Turn his phone into a usb-hotspot and plug it into his work computer or bring in his own laptop / mini-pc (size of a raspberry pi, there are plenty of options) and plug it into the monitor and keyboard of his work computer. One way or another, get access to the net and if he doesn't want to do something productive at least he can read Hacker News all day long. Just stay off facebook in case that CTO looks over his shoulder. That would be too easily recognized.