We've all seen it. John knows the ins/outs of a particular process. John boasts his knowledge, skills of that process, John knows it all, John is the man. Everyone goes to John, "John is out today? He’s the only one that can help us, we have a deadline. Did he leave notes on what we should do? He knew this was due today". "What am I supposed to tell the customer? How do I respond to the customer?"
John is part of a team of eight, a well skilled and knowledgeable team of eight. Each member of the team brings something different to the table but John, he knows everything, and he’s the “go to guy”.