Dr. Williams provided legal assistance to the government of Afghanistan in drafting and implementing the 2004 constitution. He also advised the Government of Afghanistan on legal issues regarding implementation and compliance with the Convention to Eliminate Discrimination Against Women (CEDAW).
Dr. Williams advised the government of East Timor on issues related to the law of the sea in their negotiations with Australia over the oil and gas resources in the Timor Gap.
Working in collaboration with the U.S. Institute of Peace, Dr. Williams provided legal assistance to the mediators of the Philippines-Mindanao peace process.
Burmese Pro-Democracy Movement
Dr. Williams provided legal assistance to the National Council of the Union of Burma on the use of international legal mechanisms to challenge the legitimacy of the ruling military junta
Dr. Williams provided legal assistance to the Nepalese government regarding the creation of a Truth and Reconciliation Commission. He also advised the Nepalese Constituent Assembly as it prepared a post-conflict constitution.
Dr. Williams assisted the Sri Lankan government during the Geneva peace negotiations, including advising on mechanisms for devolving power to provincial governments and developing a strategy to address the reintegration of former combatants.