Tamer Şahin (born in İzmir, Turkey) is a Turkish white hat hacker living in the United States.

Şahin worked on the philosophy of Ethical Hacking and concentrated on institutionalizing his professional life.

He has consulted on various cases concerning cyber security at both national and international level.

He used his talent as an Ethical Hacker to detect the vulnerabilities of numerous computer systems and developed defense strategies for some of the leading organizations in the private sector and also public institutions.

The New York Times journalist [1] and US Cybersecurity and Infrastructure Security Agency advisor[2] Nicole Perlroth, referred in her best seller book "This Is How They Tell Me the World Ends", to Tamer Sahin and described him as "the first person in the world who found and sold a Zero Day vulnerability".