In 1995, Tammy Williams represented Australia at the United Nations Human Rights Commission and spoke about human rights violations. She has also worked with world leaders including the former Russian president Mikhail Gorbachev.
Admitted to the bar in 2002, she has worked as a Commonwealth prosecutor and on quasi-judicial bodies, as well as serving as a member of the National Human Rights Consultative Committee.
Williams has served as a director of the Indigenous Enterprise Partnership and has been a governor of the Foundation for Young Australians. Tammy is Lesley Williams' daughter, and co-wrote Not Just Black and White with her mother.