Between 1996 and 1999, he worked as a faculty member at Yüzüncü Yıl University and as an expert at the Forensic Institution.

He retired voluntarily and took the representation of the "Memory Center of America" in Turkey in 1998.

Turkish mob boss Sedat Peker claimed that Nevzat Tarhan is a psychological warfare consultant to SADAT.

[6] He has been the chairman of the board of NPİSTANBUL, Turkey's first neuropsychiatry hospital, and is also the founding rector of Üsküdar University.

He took part in the organization committee of 7th International ECNS Congress which was held in İstanbul in 2007.