The CEO of Fifth Third Bancorp is joining the governing body of one of the largest utility companies in the U.S. Kevin Kabat has been elected to the board of directors at NiSource (NYSE: NI), with 3.5 million natural gas customers and 500,000 electric customers across seven states through its Columbia Gas and NIPSCO brands. “We’re pleased to have Kevin join the NiSource board of directors,” said NiSource board chairman Richard Thompson. “As an executive responsible for the strategic direction…