I thought virtually any employer around would require you to turn your work PC off at the end of the day. I find that some of the Tor relay nodes are on corporate networks, and some employees have Tor relay nodes running on them all weekend. I can find this by surfing my web site through Tor, and looking at the access log, and I see that there is one node on a corporate network in Germany that some employee is turning into a Tor relay node all weekend. I would think that any employer would not allow someone to leave their computer on after they leave work, but someone on a corporate network in Berlin is running a Tor relay node on their work PC, after they leave work for the day.
There are two methods for creating Tor nodes. The first, is to create a relay node requiring the Tor software to use, then the other is to install the Tor software on a server, but configure it to work as a public Tor proxy, and anybody can access, Tor software not required, that routes their traffic ontothe Tor network. That is what I operate on my server. Anybody around the world can access Tor from Tor entry servers, like mine, without having to install the client software. Very handy on work or school PCs where the machine is locked down to prevent installation of any software. Just change your browser setting to any public Tor entry server, and you are good to go.