After graduation, he completed his military service as a dentist after his education in the USA and volunteer work in the country, which contributed a lot to his professional development.

In 1993, together with his twin brother, he opened his first practice in the place where Kordondent ADSP is currently located. Later on, this practice was renovated and modernised to meet the needs of the age with the name of Kordondent ADSP, Alsancak.

In 2018, he established his 2nd polyclinic in Karşıyaka, on the other side of Izmir, and since then he has been working full-time at Kordondent ADSP, Karşıyaka branch.

Dt. Hüseyin Çetin has participated in numerous trainings, seminars and congresses at home and abroad. Professionally, he has developed himself on aesthetic dentistry and prosthetic treatments, which he is most interested in.