HOUSTON — Kenneth F. Spitler, 60, Sysco's vice-chairman, president and chief operating officer of Sysco Corporation, is retiring effective June 28. Bill DeLaney, Sysco's chief executive officer, has already assumed the additional title and responsibilities of president.

"It is impossible to adequately express our gratitude for Ken's service to Sysco," said Mr. DeLaney, Sysco's president and c.e.o. "Sysco's continuous operational improvements, especially throughout the recent difficult business environment, were accelerated by Ken's leadership throughout his 24-year career at Sysco."

"I've had the honor of leading the foodservice industry's best operators," Mr. Spitler said. "The foundation they have built by delivering 40 years of continuous improvement, and their continuing commitment to our customers' success, will serve Sysco well for the next 40 years."

Sysco specializes in selling, marketing and distributing food products to restaurants, healthcare and educational facilities, lodging establishments and other customers who prepare meals away from home.