Networking is all local. If there are airports near you that have significant number of bizjets, you need to get known--visits, info from line techs, former colleagues that might be at one of the local operators. Networking is NOT handing out business cards at NBAA. You need to have a reputation as reliable, having something to offer, done valuable work for someone. I got my job by staying touch with someone I helped in the Reserves. Minor, on my part, but my contact thought it valuable to him, remembered it and was a great help when I knocked on the door. That said, you have to come to the interview with quality flying time and the right resume.
There is nothing wrong with knocking on doors or calling a chief pilot just to introduce yourself and get known.
GF