William G. “Gerry” Coan, 70, an investment manager who worked for more than 25 years at First Internet Securities Network in Bethesda, died Oct. 29 of pulmonary failure at Inova Alexandria Hospital.

His death was confirmed by his wife, Kelley Coan.

Mr. Coan, an Alexandria resident, began working at his brother’s company, First Internet Securities Network, in 1984. The company was sold to Landolt Securities in June.

From 1971 to 1983, Mr. Coan worked as an urban planner at the now-defunct New Communities Development Corp., which was then part of the U.S. Department of Housing and Urban Development. His previous positions included working as an urban planner for the old Rouse Co. in Columbia.

William Gerard Coan was born in Philadelphia and raised in Annapolis, where he was a 1960 graduate of St. Mary’s High School. He received a bachelor’s degree in economics from Georgetown University in 1964 and a master’s degree in city and regional planning from Catholic University in 1967.

Mr. Coan was a past state director of the Virginia chapter of the National Computer Graphics Association. His memberships included the Urban and Regional Information Systems Association.

His first marriage, to Mary Ellen Brady, ended in divorce. Survivors include his wife of 33 years, Kelley Weissenborn Coan of Alexandria; a daughter from his second marriage, Kathryn Coan of Alexandria; four brothers, Carl Coan of Falls Church, Ralph Coan of Kensington, Thomas Coan of Annapolis and John Coan of Arlington; and three sisters, Patricia Fitzmaurice of Bowie, Catherine McCarthy of Sherwood Forest and Joan Schumacher of Turnersville, N.J.

— Megan McDonough