Johan Huibert Zeeman III, a longtime resident of Palm Beach, Florida, and Warren, Vermont, was born in Soerobaja, Java, on February 23, 1928. He graduated from Geelong Grammar School in Melbourne, Australia, then the Royal Netherlands Naval Academy. His father, Dr. J. H. Zeeman II, was a Dutch ambassador serving over the years in Iran, Laos, Thailand and Cambodia, Communist China, and finally Denmark.

Zeeman's stepfather was Admiral Frits W. Coster who commanded the Allied Naval forces that escaped from Europe to Australia during World War II. His mother was Anna Caterina Cramer, an opera singer. Young "Hans," as he was called, served as a lieutenant in the Royal Dutch Navy from 1949 until 1954, navigating a naval vessel in the Dutch East Indies and New Guinea.

After his marriage in Palm Beach in 1954 to Joan Javits, niece of the late New York senator, he was released from the Dutch Navy and moved to Larchmont, New York, becoming a U.S. citizen and working until 1963 as a financial analyst for New York Stock Exchange firms L.F. Rothschild and Andresen and Co.

In the 1960s, he served as an executive of Empire Millwork in New York and then as president and CEO of Powr Pak Inc., a Connecticut aerosol company that introduced Silly Soap for kids. From 1965 to 1968, he was president and CEO of Educator Biscuit Company in Lowell, MA, and VP of Corporate Development at Victoria Investment Corp, its parent company. From 1968 until 1973 he served as president of Apollo Industries, an American Stock Exchange company that developed and supplied uranium and heavy metals. He also made a winning bid for a gasline from Iranian NOIC through Russia to East Germany.

In the 1970s, he raised the initial funding for the new telephone company MCI with his close friend William McGowan and was key director, resigning after Mr. McGowan's death. Other boards on which he served were Priva, a company with leading technology later put to use for Homeland Security, and Thinking Pictures, a developer of a novel electronic technology for advertising industries. In the 1990s, he was CEO of Condyne Electronics, Inc.; a director of HDA International, Inc., a leading European manufacturer of computer parts for IBM, Sony, etc.; a director of Telecomm, Inc., a phone company and chairman of the executive committee of Teklicon, a high-tech consulting company in Mountain View, CA, specializing in litigation support.

In later years, he became corporate chairman of Mariner Financial, consultants; key director of New Horizon Diagnostics, Inc., manufacturing biomedical products; a founder of Oncure, a chain of radiology centers based in Jacksonville, FL; and a director of Neogenix Oncology Corporation, a company with revolutionary products at FDA for fast-track approval as a cure for pancreatic cancer.

John "Hans" Zeeman leaves his wife and companion of 55 years and their children Jonathan and Suzanne Carmick Zeeman and granddaughter Zoe; Eric and Andrea Zeeman Deane and grandchildren Kaeli and Jessup; Eloise Zeeman and granddaughter Lily; Mark and Phoebe Zeeman Fitch and grandson Duncan; and Brian and Merrily Zeeman Bodell and grandchildren Cotton and Ellery.

A celebration of his life will be private.

Donations could be made to the American Cancer Society aimed at finding a cure for small cell cancer.