After graduation from the Naval Academy, he won a Rhodes Scholarship (1963) for studies at Oxford University, where he obtained a master's degree in politics, philosophy and economics.

After working briefly at the Battelle Institute in Geneva,[4] he founded an international business consultancy which provided analysis to clients in many different economic sectors.

The consuming cause of Andy Sundberg’s adult life was the defense of the interests of overseas American citizens vis-à-vis the U.S. Government in Washington, D.C.

[6] The efforts of the ACCRL were successful; with the help of Rep. Robert McClory (R-IL), the law was changed in 1978 to permit children born abroad to American citizens to retain United States citizenship acquired at birth.

94-203), signed into law by President Gerald Ford on January 2, 1976, gave American civilians resident abroad the right to vote in federal elections.

[11] In the early 1980s, while living in Geneva, he flew regularly to Washington, where he served on the staff of the chief deputy majority whip in the U.S. House of Representatives.

In 1988 he became known worldwide when he ran for President of the United States as a candidate in the overseas Democratic Party primary; he came in third after winning the vote in five countries.

[14] He was an active member of Liberal International from 1984 until his death and worked with the Committee on Migration of the Parliamentary Assembly of the Council of Europe for more than a decade.

Shortly after Sundberg’s death, another of his cherished initiatives finally came to fruition: a report was published by a Working Group of Americans living in Switzerland, which had organized a series of widely attended Town Hall Meetings held in different Swiss cities earlier in 2012.

This extensive and impassioned review of how various U.S. policies impact citizens abroad was aimed at getting these issues onto the radar screens of Washington policy-makers.