Since becoming a union member in 1985, Eduardo Rosario has been an activist leader holding numerous elected and appointed positions in the union movement. He was an organizer and chair of the Community Services committee for the Northern California Conference of Newspaper Unions during the Northern California Newspaper Strike of November 1994. He later became president of Graphic Communications International Union Local 4, as well as president of the San Francisco chapter of the Labor Council for Latin American Advancement (LCLAA). As a member of the executive board of the San Francisco Labor Council (AFL-CIO), he has coordinated international conferences such as the Western Hemisphere Conference Against NAFTA and Privatization that brought together 413 delegates from 21 nations from throughout the Americas, and the Open World Conference that brought together 560 delegates from 56 nations from around the globe. He has proudly represented the U.S. labor movement as a juror to the International Conference Against Child Labor and Forced Labor, held in Mexico City, and was a member of the National AFL-CIO delegation to the People's Summit held in Santiago, Chile. Today he is the Contract Administration Coordinator for AFSCME Local 375 at District Council 37 in New York City. A fellow of the Cornell University/Worker Institute, he has earned a Master of Arts in Labor Studies from the CUNY Graduate Center/School of Professional Studies, a Bachelor of Arts in Labor Studies from the National Labor College, as well as a Certificate and Advanced Certificate in Labor Studies from Cornell University. His Master degree thesis was titled, "U.S. Labor Combating Environmental Injustices: organizing opportunities locally and globally", as well as his Bachelor degree thesis titled, "The Dismantling of the Manufacturing Clause: another victim of deregulation", which earned him a "Distinguished Paper Award" from the National Labor College. Hermano Rosario is the president of the New York City chapter of LCLAA the largest chapter in National LCLAA, and is the first person to ever become president of a LCLAA chapter on both West and East Coasts. Ever since 1992, LCLAA has always played a pivotal role in his life and continues to do so today.