Joe Browne ended a 50-year career at the National Football League office on March 31, 2016 as the longest serving employee ever in that office.He began as a 17-year-old college intern in 1965. Upon his NFL retirement, he told younger colleagues they should consider changing their career path every 50 years or so simply to stay fresh. After serving on active duty in the United States Marine Corps, he became a full-time NFL employee in 1970 and was named to several key front office posts by then Commissioner Pete Rozelle during the next 20 years. Wikipedia
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