Mary D. “Missy” Lewis, an office manager and sales clerk in the Washington area for more than 30 years, died July 20 at her home in Silver Spring. She was 58.

The cause was pancreatic cancer, said her husband, John R. Lewis.

Mary Denise Crowley was born in Chelsea, Mass., and settled in the Washington area in 1982.

From 1984 to 1995, she was a sales clerk at the Treasure Chest jewelry story in Rockville. From 1995 to 2010, she was manager of the Bethesda office of cardiologist Robert F. Dyer. From 2010 to 2012, she was an office assistant at the National Leased Housing Association.

She was a member of Grace Episcopal Church in Silver Spring.

Her first marriage, to Joseph O’Brien, ended in divorce.

Survivors include her husband since 1989, John R. Lewis of Silver Spring; a son from her first marriage, Patrick O’Brien of Winston-Salem, N.C.; a stepson, Sean R. Lewis of Reston; a sister; two brothers; and a grandson.

— Bart Barnes