Who was the defensive coordinator for the famed Steel Curtain defense?

The defensive coordinator for the famed Steel Curtain defense of the Pittsburgh Steelers was Chuck Noll. Under his leadership, the Steelers developed a dominant defensive unit in the 1970s that played a crucial role in the team's four Super Bowl victories. The Steel Curtain was known for its formidable front seven, featuring players like "Mean" Joe Greene and Jack Lambert. Noll's strategic ingenuity helped solidify the Steelers' legacy as one of the greatest defenses in NFL history.