Hasan Deniz has been working at the Mother Child Education Foundation (AÇEV) since 2002.

Within AÇEV, he has been involved for many years in the implementation of educational programs, campaigns, and advocacy activities aimed at promoting a fatherhood model that encourages fathers to take responsibility for the care and development of their children, establish close relationships with them, and spend quality time together. He works to spread democratic, engaged, and nurturing fatherhood attitudes by collaborating with fathers directly and with all stakeholders that influence fathers, including public institutions, local governments, the private sector, media, and NGOs, using a holistic approach.

He also conducts training programs and seminars aimed at fostering equitable division of household responsibilities and creating a democratic home environment. Hasan has worked with various organizations to develop educational programs and models aimed at promoting change among fathers and men to prevent violence against women.