Bob Sternfels, global managing partner of McKinsey.
McKinsey & Co. global managing partner, Bob Sternfels, testifies before Congress.
  • Leaders at McKinsey and other major consulting firms testified before Congress this week.
  • US lawmakers grilled the executives over their work in Saudi Arabia.
  • "We are between a rock and a hard place," McKinsey partner Bob Sternfels said.

US Congress this week questioned the loyalties of some of the country's biggest consulting firms.