Prior to founding Together We Count, Rosemary was the State Director for Senator Michael Bennet of Colorado. She also served as a commissioner on the U.S. Election Assistance Commission, and chaired the commission in 2008.

Prior to that, Rodriguez served on the Denver City Council for three and a half years, and was council president from 2005 to 2006. She also chaired the 2001 Colorado Reapportionment Commission, a constitutional body that was responsible for redrawing legislative districts after the 2000 Census.

Rosemary is a Colorado native and attended Metropolitan State College (now Metropolitan State University), where she studied Political Science.