Title: Vice president, global purchasing and supply chain Company: General Motors Main point: GM purchasing will rein in costs not by squeezing suppliers on price but by changing the way it relates to them. DETROIT -- If Sergio Marchionne, CEO of Fiat Chrysler Automobiles, is looking for an ally to wring price concessions from suppliers, he won't find one in Steve Kiefer, General Motors' newly installed head of purchasing.