John Ware, 47, who runs the Oxford Foundation, a family philanthropy, was arrested Friday at his Oxford, Pa., home, The Philadelphia Inquirer reported.
Ware is a former member of the Chester County Parks and Recreation Board and board member of Chester County 2010.
U.S. Attorney Zane Memeger said Ware befriended four young boys to prepare them for sex with him and took them on foreign trips to molest them overseas when they turned 13.
Ware's indictment states that he took his first victim to Iceland, the second to Italy and the third and fourth to the Bahamas in incidents between 2005 and July 2010.
The investigation grew out of Project Safe Childhood, a nationwide campaign against child sexual abuse, Memeger said.
Ware also is charged with possessing child pornography and faces a possible sentence of life with a mandatory minimum of 15 years, a $1.8 million fine, and a mandatory five years of supervised release.
His grandfather, the late Robert Ware, was a congressman.
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