Jon Gilbert “Gil” Clopper, 87, of Solomons, Maryland, formerly of Gambrills, Maryland, passed away peacefully on May 3, 2026, in Prince Frederick, Maryland.

Born on June 15, 1938, in Waynesboro, Pennsylvania, Gil was the son of the late Leroy Clopper and Anna Elizabeth (Bloyer) Clopper.
Gil graduated from Northwestern High School in Hyattsville, Maryland, in 1957. He proudly served his country in the United States Army from 1961 until his honorable discharge in 1963. During his military service, he was stationed at Fort Jackson, South Carolina, and Redstone Arsenal, Alabama.

Following his military service, Gil began a long and dedicated career as an Engineer with the Naval Research Laboratory in Washington, D.C., where he worked for more than 30 years before retiring.
In 1967, Gil married the love of his life, Rosa Lee (Quesenberry) Clopper. Together they shared 59 years of marriage filled with devotion, companionship, and love.

Gil is survived by his beloved wife, Rosa Lee Clopper of Solomons, Maryland.
In addition to his parents, he was preceded in death by his siblings, Madeline Rophor, Frances Isabel Miller, Robert William Clopper, and Clarence Leroy Clopper.

Services will be private. Gil will be interred at Fort Lincoln Cemetery in Brentwood, Maryland.