Cunneen served as an aide to Republican Party politicians Becky Morgan, Ed Zschau, and Tom Campbell, before going to work in the semiconductor industry. He served in the California State Assembly from 1994 through 2000. He ran in the 2000 election for the United States House of Representatives in California's 15th congressional district, but lost to Mike Honda. Cunneen was president of the San Jose Silicon Valley Chamber of Commerce for four years, and then worked for Cisco Systems for two years.
- "30 May 1994, 8 - The San Francisco Examiner at". Newspapers.com. 1994-05-30. Retrieved 2020-08-23.
- Carolyne Zinko (2000-11-08). "Democrats Fall Short Of Taking Back House / Honda leading Cunneen for South Bay seat". Sfgate.com. Retrieved 2020-08-23.
- May 15, 2007 at 7:35 p.m. (2007-05-15). "Pizarro: Cunneen to leave Cisco after 2 years – The Mercury News". Mercurynews.com. Retrieved 2020-08-23.