Mary Wareham is advocacy director of the Arms Division, where she leads Human Rights Watch's advocacy against particularly problematic weapons that pose a significant threat to civilians. She is also serving as the global coordinator of the Campaign to Stop Killer Robots. From 2006 to 2008, Wareham served as advocacy director for Oxfam New Zealand, leading its efforts to secure an arms trade treaty and the 2008 Convention on Cluster Munitions. Wareham was senior advocate for the Arms Division of Human Rights Watch from 1998 to 2006 and was responsible for global coordination of the Landmine Monitor research initiative, which verifies compliance and implementation of the 1997 Mine Ban Treaty. From 1996 to 1997, Wareham worked for the Vietnam Veterans of America Foundation, assisting Jody Williams in coordinating the International Campaign to Ban Landmines (ICBL), co-laureate of the 1997 Nobel Peace Prize together with Williams. Wareham worked as a researcher for the New Zealand parliament from 1995 to 1996 after receiving bachelor's and master's degrees in political science from Victoria University of Wellington.