Longman Dictionary of Contemporary English
founder member
noun
EXAMPLES FROM CORPUS
▪ He is a founder member of the Prison Reform Trust.
▪ He is also a founder member and stage manager of the Calder Valley Junior theatre Society.
▪ He was a founder member of the Company of Master Mariners.
▪ He was a founder member of the Edinburgh Press Club, established more than 50 years ago.
▪ He was also a founder member of Bill Bruford's Earthworks, which has recorded four albums to date.
▪ His work as a leading founder member was invaluable.
▪ In 1884 he became a founder member of the Art Workers' Guild.
Usage examples of "founder member".
For not only was their father a founder member and a life governor, but he was also a holder of the Queen's commission and a gentleman.
These ran out from the dome to form the points of a star - the symbol of Texas, the Inner State, founder member of the Federation.
Dick Plotz, founder member of the Tolkien Society of America, called to interview him for a fan-magazine.
He was a fine tenor, a good Hamlet at Cambridge, Brother of the Most Worshipful Order of the Wombat, keen train-spotter and a founder member of the Earthcrossers.
He was this much I knew by some seven years the senior in age to my great friend, and was a founder member of the Diogenes Club, that peculiar institution whose members are ever forbidden to converse with one another.