Cosmades was born of Greek parentage and served in the Turkish army during the Second World War. In 1949 he served as translator for American Aaron J. Smith during searches for Noah's Ark in Ararat. In 1950 he left Turkey for the USA, followed by evangelical work in the Lebanon and then from 1968 was based in Germany as missionary at large for The Evangelical Alliance Mission.
- J. Herbert Kane A global view of Christian missions from Pentecost to the present - 1971 "Thomas Cosmades, himself a Turk by birth and now a member of The Evangelical Alliance Mission stationed in Greece, makes periodic visits to Turkey for evangelistic meetings and personal follow-up."
- About Me - Thomas Cosmades