Born in Bremerton, Wash., he moved with his father, who served in the Navy, throughout the Pacific area as a child. He earned a bachelor of arts at the University of Virginia, where he also attended law school and was admitted to the Virginia Bar. Family members said he never practiced.
Mr. Pigman also had a master's degree in economics from the University of Pennsylvania.
He was an economist and mathematical statistician for the War Assets Administration, Mine Safety Appliance Co., the Bessemer and Lake Erie Railroad and the U.S. Centers for Medicare and Medicaid Services. He also taught at the State College of Washington, Temple University, Duquesne University and Dundalk Community College.
Mr. Pigman enjoyed travel and played classical and flamenco guitar. He worked with watercolors and pastels, grew tomatoes and made wine. He also sailed and hunted for shark teeth.
Services are private.
Survivors include four daughters, Natalie Wrigley of Glastonbury, Conn., Hannah Davenport of Columbia, Joy McIntyre of Derwood and Susan Pigman of Columbia; a sister, Arzelie J. Pigman of Portland, Ore; six grandchildren; and a great-grandson. His wife of 55 years, Irene Pretzer, died in 2006.