<sc>l</sc>-cysteine biosynthesis from inorganic sulfur represents a major mechanism by which reduced sulfur is incorporated into organic compounds. Cysteine biosynthesis and regulation is well characterized in <i>Escherichia coli</i>. However, the regulation of sulfur metabolism in <i>Acinetobacter baumannii</i> is only partly understood, with the LysR-type regulator, GigC known to control some aspects of sulfur reduction. In this study, we have used transcriptomics and bioinformatic analyses to characterize a novel LysR-type transcriptional regulator encoded by ABUW_1016 (<i>cbl</i>), in a highly multidrug resistant and virulent isolate of <i>A. baumannii.</i> We have shown that Cbl is involved in controlling expression of the genes required for uptake and reduction of various sulfur sources in <i>A. baumannii</i>. Collectively, we have identified the global regulon of Cbl and proposed a model of cysteine biosynthesis and its regulation by Cbl and GigC in <i>A. baumannii</i>.