Jock has a ton of hair and it often seems like most of it is on his head and face. How you cut it depends on your personal tastes, your breed's specific styles, and how creative you feel like being. It helps if you visualize Jock's head in terms of three different sections: the top of his head going from the brow line to the back of the skull, the sides of his head and cheeks going from just under his ears to the outer corner of his eyes, and the chin, going from his chin to the middle of his throat.
While Jock might not be worried about having his coat groomed, when it comes to shaving his face, that’s a horse of a different color. When the hair on his own head becomes long enough to get in his eyes and block his vision or get inside of his nostrils where they can irritate his sinuses, he will probably start trying to let you know that it's time for a trim.
It really doesn’t take long to learn how to shave your dog's face, but it does take a lot of patience and an eye for detail. The most important thing to remember is to take your time and work with Jock instead of against him and you should have no problem shaving his face. Feel free to consult professional groomers for tips and tricks for making the process pain-free and fun.