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Joseph Hooper Mettle Jr., engineer, dies
Joseph Hooper Mettle Jr., engineer, dies

Joseph Hooper Mettle Jr., a retired communications system engineer who had worked for the National Security Agency for more than three decades, died July 30 of liver cancer at his Eldersburg home. He was 77. The son of a government worker and a homemaker, Mr. Mettle was born in Baltimore and raised on Reisterstown Road in Northwest Baltimore. He attended Mount St. Joseph High School in Irvington, and after graduating from Forest Park High School in 1952, enlisted in the Marine Corps. He served for four years as a cryptographic and telegraphic repairman, attaining the rank of sergeant. He began his career in 1957 working for the NSA at Fort Meade as a communications systems engineer. ...

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