Mike Keenan, one of the original Mad Men, died Sept. 9 in Falmouth. He was 80.

Born in Columbus, Ohio, Keenan was an avid sailor and member of the Harlem Yacht Club. Following studies at Admiral Farragut Academy in St. Petersburg, Fla., he graduated from Duke University in 1955 then served as Special Agent in the U.S. Army’s Counter Intelligence Corps.

Keenan retired in 2013 after 56 continuous years in various ad agency positions, probably the longest run in a notably precarious and fast-changing industry.

His last position was as vice president of client services at U.S. International Media, successor company to the originator of the media agency concept, Western International Media, which grew to be the world’s largest when it was acquired in the late 1990s by Interpublic Group of Companies. He joined Western in 1985 and was managing director of the company’s East of the Mississippi and Canadian divisions at the time of the acquisition.

Keenan had a long and successful run with many ad agencies in New York, including the famed anchor Procter & Gamble agency, Compton Advertising; Foote, Cone & Belding; Lennen & Newell; Fuller & Smith & Ross; and Keenan & McLaughlin. His accounts included Mobil, Lever Bros., Air France, Michelin, Warner Lambert, Guinness, American Airlines and Heineken.

Keenan also served as president and CEO of pre-dot com crash TELA Interactive, was eastern region chairman of the American Association of Advertising Agencies (4As), and a marketing lecturer at Rutgers University and City University of New York.

Keenan’s wit and curious mind will be dearly missed.

He is survived by his partner of 35 years, Mary Winslow. He is also survived by Jane Keenan, to whom he was married for 20 years and had six children. He also leaves 17 grandchildren and two great-grandchildren.

A funeral mass will be celebrated at 11 a.m. on Saturday, Sept. 13, at St. Anthony’s Church, 167 East Falmouth Hwy. (Rt 28), Falmouth.

For online guestbook, obituary and directions, please visit ccgfuneralhome.com.