Andrew Allen, director of community relations for Principal Financial Group Inc., will become the next CEO of Youth & Shelter Services Inc., the Ames-based organization announced. Allen will succeed YSS’ founding CEO George Belitsos. Allen has a 20-year history serving YSS as a volunteer. He became the charter youth member on the YSS board of directors and later served on the organization’s foundation board. He was co-chair of capital campaigns for the YSS Family Life Center and Iowa Homeless Youth Centers, and also created Reggie’s Sleepout. Allen will begin his new role on July 1.