If you’re a marketer and can only talk to marketers, you are not going to get far.
If you’re a salesman and can only talk to sales folks, you are not going to get far.
If you’re a developer and can only talk to developers, you will still have job security, but you are not going to get far.
If you’re a strategist and can only talk to business people, you are not going to get far.
Build networks instead, inside and outside of your turf. Learn to speak different languages and to talk to different people. Be a mediator and an initiator.
That’s when you are going to get far.