Pat D. Gacoscos was first elected to the Union City Council in 2010 and re-elected in 2014. She was Vice Mayor in 2012. Previously, she held two elective positions: a School Board Member for the New Haven Unified School District from 1992-2000; and a member of Board of Directors for the Union Sanitary District from 2004-2010. She also served as Alameda County and Union City Human Relations Commissioner.
Pat chairs the Union City Sister Cities program and is a member of various community organizations. She was a teacher in Manila public schools and a retired Research Analyst for the California Department of Public Health.