There is another thread running which has more detail.
However, the main point is that only the Global and occasionally/rarely the Falcon fly to the US and Asia.
The new hires are most probably going to be joining the Phenom 300, Cessna Excel and possibly the Cessna Latitude fleets. If business needs dictates, the Challenger 350, Falcon 2000 EASy and the Global.
As for how often? A standard long range roster is 7 days on 6 days off. But how often they go long range? I am afraid I don't know. Some often, others rarely. "It depends".