Are any of these servers what you are looking for?

Servers with "Competitive" and "office" in the name:
[DE] [COMPETITIVE] [cs_office] [gameME] by teamspeak3.de
[DE] [COMPETITIVE] [cs_office] by teamspeak3.de
[DE] [COMPETITIVE] [cs_office_se] by teamspeak3.de
[DE] [COMPETITIVE] [cs_office] by teamspeak3.de