 Ömer Diler was trained as a chemical engineer but became interested in numismatics in 1972 when he received a rare gold coin of the Ottoman Empire as a gift.He wrote a number of articles for the Turkish Numismatic Society ("Türk Numismatik Derneği") and was also a contributing editor of the American Numismatic Society.In 1981, Diler published a book with Garo Kürkman on the coinage of the Anatolian beylik of 'Alâiye.