Who is in charge of Judaism?
No human being or body of human beings is in charge of Judaism. There are multiple organizations with varying popularity among Jews, but no one body is in charge of "Judaism" in a general sense. The conservative and reform movements have a more organized system than orthodox Jews, but even there it is not completely clear who is in charge. Somehow all these different groups survive at the same time, and Judaism continues dispite its lack of a higherarchy. Or perhaps because of it.