Executive Flitways at ISP operate 3 G-4's, but my info is that there are no openings with any one of the 3 (2 are owned by a Fortune 500 Investment Bank). The 2 G-4's at Summit have been there for around 2 years already, so they aren't new at all. Suggest you try some of the other charter operators in the NY metro area, such as Privatair, TAG, Jet Aviation and the like. New World Aviation at ABE is constantly expanding, so that may also be an option. All of these operate sizable fleets, including many G-4's. IMHO, much easier to get on with them, then try a part 91 operator after building up quality time with the 135 boys.