Commercial loan officers specialize in loans to businesses, which often use the loans to buy supplies and upgrade or expand operations. Commercial loans frequently are larger and more complicated than other types of loans. Because companies have such complex financial situations and statements, commercial loans usually require human judgment in addition to the analysis by underwriting software. Furthermore, some commercial loans are so large that no single bank will provide the entire amount requested. In such cases, loan officers may have to work with multiple banks to put together a package of loans