Today, as CEO of Mongolian Concepts Restaurant Group, Gregg Majewski sits at the helm of  3 brands:  Ghengiss Grill, Flat Top Grills and BD’s Mongolian. But this restaurant and franchise executive checks the box for growing more than just this roster of brands, as straight out of college 20 plus years ago, Gregg went from the role of accounting apprentice, to Controller, from Controller to CFO, then from CFO to COO and ultimately straight to the top of the house as CEO of none other than Jimmy Johns.  Over the course of 5 years, he contributed to the growth of that iconic sandwich chain from 307 open and operating when he arrived, to more than 300 on his watch when he exited, 5 years later.  And, he's well on his way to doing it all over again with Mongolian Concepts.  Gregg Majewski, this week on Franchise Today.  .