Q. Is there a mitzvah to mekarev a ger who has lapsed in observance the same way that there is a mitzvah to mekarev someone born Jewish?

A. Once a ger underwent a proper Halacha accepted gerus, he is considered to be a Jewish person for all purposes and if he lapsed in observance, Horav Shlomo Miller’s Shlit’a opinion is that one should be mekarev him as one would do with any other Yisroel.

Rabbi A. Bartfeld as advised by Horav Shlomo Miller Shlit’a