CL300.
Having your own mechanic to watch over maintenance is essential for all aircraft at any maintenance outfit.
To quote an example, we used get our maintenance done at an outfit in Miami. Our boss had his own mechanic on site alright, during the last heavy check. However he was so stupid he messed his pay around. As the maintenance outfit were a bunch of crooks (who isn't in aviation?) they "recruited him" and bestowed lavish gifts etc., upon him. The boss? Well he had to sell the aircraft to foot the bill.