Pasadena, California - Largest employers by number of employees (2012)

Reference 1: # of employees.

Reference 2: Jet Propulsion Laboratory, Kaiser Permanente, California Institute of Technology, Huntington Hospital, Pasadena Unified School District, ATT, City of Pasadena, Pasadena City College, Bank of America, Pacific Clinics, Art Center College of Design, OneWest Bank, Parsons, Hathaway-Sycamores, The Langham Huntington, Western Asset, Rusnak Auto Group, East West Bank and Avon Products.

Source: http://en.wikipedia.org/wiki/Pasadena,_California