Mark Splain began organizing in 1967 on the west side of Chicago, organizing against blockbusting and housing discrimination. He resides in San Francisco, California and Washington, D.C.
National Welfare Rights Organization
United Labor Unions
Service Employees International Union
In 1989 Splain was named the Deputy Director of the AFL-CIO's Organizing Institute. In 1995 he was named by John Sweeney as the Director of the thirteen state Western Region for the AFL-CIO, and in May of 2000 was named Director of Organizing. He is currently a Special Assistant in the AFL-CIO’s Department of Organizing, working with and assisting the organizing efforts of the United Farm Workers.
The Organizers' Forum
As at Jan 28, 2010 Mark Splain was on the Board of Directors of The Organizers' Forum, a group with the mission of strengthening grassroots organizations by increasing capacity and stability of their democratic structures, to link organizing networks, and to improve on the skills and strategies employed by both community and labor organizers.
Support for Bernie Sanders
Mark Splain pledged support for Bernie Sanders through Labor for Bernie, a "nationwide network of labor activists, backing Bernie Sanders' 2016 presidential campaign."