As an MIT man I never had trouble sleeping in the computer lab, a mattress or crashing on a couch at the frat.
If you need an executive who does not mind sleeping at work (ie considers the workplace his home and vice-versa) use the proper HR marketing to find him/her and me.
Workaholics eponymous. You will find many of those among Greeks and others in Greece.
That's the Greece I know.