She is the leader of the anti police group Twin Cities Coalition 4 Justice 4 Jamar which was the group responsible for sparking the April riots in Minneapolis after the police killing of George Floyd.
In 2007 Jess Sundin was a member of the Twin Cities based Anti-War Committee and the Coalition to March on the RNC and Stop the War which caused major havoc at that years Republican National Convention.
In 2000 Jess Sundin, of the Colombia Action Network, led a small delegation of three North American activists to Bogata Colombia, to attend a conference "responding to U.S. military aid" for the Colobian government. The delegation also traveled to the area in Southern Colombia controlled by the guerrillas of the Revolutionary Armed Forces of Colombia - People's Army. A State Department designated terrorist group.