Go to www.iamcs.org and click on “Directory.” There are other Messianic congregations listed elsewhere on the Internet, but you should be aware that there are a few groups that call themselves Messianic that may not be truly Messianic Jewish.   Find out what Semikhah (ordination) their leader may have, what organizations they may be affilliated with, and follow the Biblical example of testing their teachings by the Scriptures.