Having worked for McKinsey myself, I can assure you they are/were not. Client confidentiality is holy and you normally do not talk to your colleagues about the

Having worked for McKinsey myself, I can assure you they are/were not. Client confidentiality is holy and you normally do not talk to your colleagues about the work you do. McKinsey oftentimes serves clients on both sides of an M&A deal for example and has strict procedures in place to keep teams separate.