MRC Global Inc. announced that George Damiris and Ronald Jadin have both joined MRC Global?s board of directors. Mr. Damiris previously served as the president and chief executive officer of both HollyFrontier Corporation and Holly Energy Partners from 2016 until 2019. Mr. Jadin previously served as the chief financial officer of W.W. Grainger Inc. from 2008 until 2018. From 1998 until 2008, he served in various finance and leadership roles with Grainger, and before that, with General Electric Company.