Bacterial RNA-binding proteins (RBPs) perform key functions to regulate stress responses and development. Bacterial RBPs, including the RNA chaperones Hfq and ProQ, the global regulator CsrA, and the cold shock proteins (Csps), have been extensively studied, although additional classes of RBPs have been predicted by bioinformatic methods, including those carrying an RNA recognition motif (RRM) domain. This work expands on recent studies of RRM domain proteins in bacteria to characterize a membrane-bound RRM protein that regulates bacterial biofilm development. Given our rapidly expanding knowledge regarding the role of RNA-binding proteins in bacterial molecular biology, this work contributes a new class of membrane-bound regulators with homologs in human pathogens and marine symbionts.