Upon graduation, he entered the US Navy and served as a first lieutenant and gunnery officer on the USS Mattabesset in the Mediterranean Sea during the 1958 Lebanon crisis.

[2] Beginning in 1966, Aylmer served two terms on the Barnstable board of selectmen,[5] and in 1969 earned a master's degree in education from Bridgewater State College.

[7] As a senator, Aylmer was "a driving force behind securing state funding for the Cape and Islands,"[8] advancing legislation such as the Old King's Highway Historic District act.

[2] In 1981, Aylmer vacated his senate seat during his sixth term and was appointed a rear admiral and President of his alma mater, Massachusetts Maritime Academy.

In 2011, the Hyannis club dedicated its field house at McKeon Park in Aylmer's honor, and in 2012 he was inducted into the CCBL Hall of Fame.