In 1998, Chima founded the first Student environmental justice group in Nigeria.
In October 2020, He was appointed as the executive director of the Environmental Rights Action/Friends of the Earth Nigeria (ERA/FoEN).
Environmental Rights Action (ERA) which is an advocacy NGO founded on 11 January 1993 in Nigeria to combat environmental human rights issues in Nigeria.
ERA is the Nigerian chapter of Friends of the Earth International (FoEI)[5][6][7] Chima Williams is one of the awardees of the 2022 Goldman Environmental Prize across the globe.
The award was given for his work in protecting the earth by holding Royal Dutch Shell accountable for oil spillage from their facilities into the Niger Delta communities.