Sosa first entered public service in 1986, when he was elected to the Mount Holly Township Council in Burlington County, New Jersey. He was subsequently re-elected and served two terms as Mayor. Sosa then served in the New Jersey General Assembly from January 1992 to January 1994. He was the prime sponsor of successful legislation to reduce the New Jersey State Sales Tax, a $600 Million savings to the state’s taxpayers, and other legislation aimed at bolstering the state’s economy. A former Vice Chairman of the New Jersey Republican State Committee, Sosa was tapped as a leading spokesman for the Republican National Committee during the 1992 presidential campaign; he addressed the nation at the Republican National Convention in Houston, the only individual from New Jersey bestowed this honor.

In 1993, Sosa served as a consultant to Johnson & Johnson to help advocate for the protection of its business interests in Puerto Rico. Sosa enlisted the support of other corporations with similar interests on the island; he subsequently created and directed PRO-S936 (Puerto Ricans Organized to Save 936), a successful grassroots campaign conducted on the mainland United States that resulted in a negotiated compromise by the Clinton Administration and the Congress to preserve the majority of the benefits of Section 936 of the Internal Revenue Service Tax Code.

Sosa first entered public service in 1986, when he was elected to the Mount Holly Township Council in Burlington County, New Jersey. He was subsequently re-elected and served two terms as Mayor. Sosa then served in the New Jersey General Assembly from January 1992 to January 1994. He was the prime sponsor of successful legislation to reduce the New Jersey State Sales Tax, a $600 Million savings to the state’s taxpayers, and other legislation aimed at bolstering the state’s economy. A former Vice Chairman of the New Jersey Republican State Committee, Sosa was tapped as a leading spokesman for the Republican National Committee during the 1992 presidential campaign; he addressed the nation at the Republican National Convention in Houston, the only individual from New Jersey bestowed this honor.

Section 936 provided a tax credit for U.S.-based corporations that established manufacturing facilities in Puerto Rico. This initiative was the first grassroots effort that focused on engaging the Hispanic community on an issue of mutual importance to this community and the corporate sector. Organizations and leaders in cities from Chicago to New York were engaged in efforts that included Spanish language radio messages, visits by multi-state legislators to Puerto Rico and a petition drive that resulted in the generation of one-half million signatures of Hispanics in support of retaining Section 936.

In recognition of his leadership efforts on behalf of The Commonwealth of Puerto Rico, former Governor Pedro Rosselló appointed Sosa to serve as Chairman of the National Hispanic Leadership Summit. Comprised of a broad spectrum of national Hispanic leaders, Summit appointees were responsible for examining national public policy issues and their impact on the Hispanic community in the mainland United States and Puerto Rico.

Sosa was appointed by Governor Thomas Kean to the Board of Directors of the New Jersey Broadcasting Authority. Involved in a variety of civic activities, Sosa served on the Mount Holly Municipal Utilities Authority and the Human Services Board of Burlington County, New Jersey. Appointed to Governor Christine Whitman’s 1993 Transition Team, Sosa served as Chairman of the Transportation Department Transition Committee.

In April 2004, Latino Leaders Magazine named Sosa one of the Top Ten Latino Leaders in Health Care. Sosa served on the Corporate Board of Advisors of the National Council of La Raza (now UnidosUS), the National Puerto Rican Coalition, the Cuban American National Council, the Latino Leadership Alliance of New Jersey and the Council of Federations of Mexican Immigrants in North America, a California coalition of Mexican Hometown Associations. He also served on the Board of Directors of Congreso de Latinos Unidos, a non-profit, social-services organization in Philadelphia, Pennsylvania. In 2016, Sosa was appointed to the Steering Committee of the Stockton University (New Jersey) William J. Hughes Center for Public Policy.

Sosa was the commencement speaker at the 1992 graduation ceremonies at Burlington County (NJ) College and the 1994 ceremonies at Trenton State College (now The College of New Jersey). He was later appointed to the Board of Trustees of The College of New Jersey and served for six years.

Sosa received a Bachelor of Science degree in Management from Drexel University, where he received a soccer scholarship; he and his teammates competed in the NCAA men’s national soccer tournament and were inducted into the University’s Athletic Hall of Fame. Sosa also attended the Johnson & Johnson Advanced Management Program at the Kellogg Graduate School of Business at Northwestern University.

Sosa served in the New Jersey Air National Guard for six years and received an Honorable Discharge.