The “Mr. Musk Goes to Washington” spectacle is a headline-hogging mega-story, but you’ve probably never heard of the second-biggest business figure slated to serve in the Trump administration. He’s Frank Bisignano, CEO of payments processing colossus Fiserv, whom the new president has anointed to head the Social Security Administration. Put simply, Bisignano boasts an unmatched record as a crisis manager. He rebuilt Citigroup’s decimated back-office operations from the ashes of 9/11, repaired Washington Mutual’s stricken subprime book after the 2007 housing meltdown as Jamie Dimon’s fixer at JPMorgan Chase, and transformed a lumbering warhorse that was one of the worst investments KKR ever made into a potent money spinner that he merged into Fiserv, then drove the combo to reign as America’s largest non-bank handler of credit card payments to retailers, restaurants and other merchants, ferrying $2.5 trillion in payments per day.