I'm curious what your reasoning for thinking Russia and China are behind israel on this is? Surely Russia and China have put a lot more resources into this than israel even has...
Israel is currently the 2nd largest exporter of cyber security solutions in the world it's mandatory military service means that virtually every employee of those companies served in their military intelligence or signal corps and since they are in the reserves until their mid 40's continues to do. Israel is in general is largely held as the strongest player at least as far as technical capabilities go after the US/UK coop. And they also have a very strong humint and general intelligence capabilities which would allow them to penetrate an organization like Juniper (Juniper having an R&D center in Israel also helps).