Norhaiyah Mahmood is an atheist community organiser. She is part of the Executive Committee of the Humanist Society (Singapore), where she serves as Secretary and leads the Secretariat. She is the co-founder of Warung atheist and the Council of Ex-Muslims of Singapore. She is also actively involved in AAI’s Atheist Support Network.
She is actively involved in charity and humanitarian works; she established a secret library that allows people to read books on freethought and manage a sanctuary for stray cats in Malaysia.