and the Global Express have a small crew rest area just aft of the cockpit. There is a berthable seat in this compartment which can be closed off so one of the pilots can sleep if needed. Also there is a separate small crew lavatory and a small galley located opposite the crew rest area so not to disturb the passengers.
On smaller corporate jets the only other crew seat is the jump seat and they are not the most comfortable for long trips so usually the pilot would sit in one of the passenger seats. If one of the pilots has to use the lavatory, which on most corporate jets is located in the rear, he has to walk past the passengers.
Corporate jets are different that airliners in that the cockpit door is usually left open and the crew is not isolated from the passengers. There is no regulation to have the cockpit door locked and numerous times the passengers will come up front and talk to the pilots. You have to remember these planes are privately owned and in most cases only the company VIP’s are onboard.