As an undergraduate, Jim McCloskey majored in economics and was a member of Phi Gamma Delta fraternity. He played varsity baseball, participated in the "B" Club, and was a member of the intramural soccer champions.
After serving in the U.S. Navy in Japan and Vietnam, he began working in the business world. However, before long, he answered a call to the ministry and entered the Princeton Theological Seminary in 1979.
During his time at the Seminary, he became concerned with the case of George De Los Santos, whom he came to believe had been wrongfully convicted of killing a man. By taking a year off from his studies, he was able to assist in freeing Mr. De Los Santos after he had spent nine years in prison.
Over the years, Jim McCloskey's developing concern for the plight of convicted criminals who may actually have been innocent led to the founding in 1986 of Centurion Ministries, Inc. Seeking justice for the innocent in prison, his work has gained increasing recognition.