Correction: This obituary for Peter Terpeluk Jr., a Republican Party fundraiser and ambassador to Luxembourg, incorrectly appeared with a photo of Supreme Court Justice Antonin Scalia. The image was inadvertently cropped to show Scalia, who appeared next to Mr. Terpeluk in the original image. The photo has been corrected.

Peter Terpeluk Jr., a powerhouse fundraiser for the Republican Party who served as U.S. ambassador to Luxembourg and as finance chairman of the Republican National Committee, died Aug. 23 at his home in Chevy Chase. He was 63 and had a heart attack, his wife said.

After working as an official with the Small Business Administration in the early 1980s, Mr. Terpeluk formed a consulting business in Washington in 1986. He quickly became a leading fundraiser for Republican candidates and was a finance co-chairman in the presidential campaigns of George H.W. Bush and George W. Bush.

He was credited with raising more than $100,000 for the 2000 campaign of George W. Bush, who nominated Mr. Terpeluk to be ambassador to Luxembourg. He served from 2002 to 2005.

Mr. Terpeluk was finance chairman of the Republican National Committee in 2009 and 2010.

A 2009 article in the Washington Times described him as a “veteran Republican fundraiser who can speed-dial corporate board chairmen, top Wall Street investment bankers and other wealthy donors.”

Mr. Terpeluk was a finance co-chairman in the presidential campaigns of George H.W. Bush and George W. Bush. Shortly before his death, he had taken a role in Texas Gov. Rick Perry’s 2012 campaign. (Family photo)

In his book “The Money Men: The Real Story of Fundraising’s Influence on Political Power in America” (2000), former Fortune magazine and Washington Post journalist Jeffrey Birnbaum called Mr. Terpeluk “one of the nation’s top money men.”

In 2008, Mr. Terpeluk had a key fundraising position in the short-lived presidential campaign of former New York City major Rudolph W. Giuliani. Shortly before his death, Mr. Terpeluk had taken a role in the presidential campaign of Texas Gov. Rick Perry.

Peter Terpeluk Jr. was born Feb. 18, 1948, in Philadelphia, where he graduated from LaSalle University in 1966. He received a master’s degree in public administration from Rider University in New Jersey in 1972.

He was the town manager of two townships in Pennsylvania from 1972 to 1981, when he became a regional administrator for the Small Business Administration.

After serving as executive director of the Greater Philadelphia Economic Development Corp. from 1984 to 1986, Mr. Terpeluk opened his consulting firm in Washington. From 1989 to 1993, he was with the Washington office of S.R. Wojdak & Associates, a Philadelphia-based lobbying firm.

Mr. Terpeluk became managing director of American Continental Group, a lobbying and research firm, in 1994. He remained affiliated with the company until his death.

He served on the board of the Pennsylvania Avenue Redevelopment Corp. in the early 1990s and was a board member of the National Constitution Center in Philadelphia. He was a member of the Shrine of the Most Blessed Sacrament Catholic Church in Washington.

Survivors include his wife of 25 years, Diane Guglielmino Terpeluk of Chevy Chase; two children, Meredith Terpeluk of South Bend, Ind., and Peter “Trey” Terpeluk III of Chevy Chase; a sister; and a brother.