What do brothers do for Catholicism?

Roman Catholic AnswerThe role of a Catholic brother or sister is to to follow God in all things. They work that out through the particular charism of their order. Orders of strictly brothers or sisters were usually created for teaching or nursing (respectively men or women) but there are many other jobs that they fill as well. Basically, think of any role you have ever seen a nun fulfill. Brothers do the exact same things, but there are less of them, so they are not as high profile.