July 5, 2011 > Kaiser Professionals join SEIU Kaiser Professionals join SEIU Submitted By Elizabeth Brennan A group of 500 information technology professionals at Kaiser facilities across California said "yes" to Service Employees International Union, United Healthcare Workers - West (SEIU-UHW) on Thurs., June 30. The election, certified Thursday afternoon by the National Labor Relations Board (NLRB), was conducted by a "card check" or sign-up. 57 percent of employees signed cards stating they wish to be represented by the union.