The Postdoctoral Scholars Unit (PX) is a systemwide bargaining unit comprised of postdoctoral scholars and postgraduate researchers who work in support of faculty and lecturers. The unit, which includes a total of about 5,963* postdoctoral and postgraduate scholars, is represented by the United Auto Workers (UAW) Local 5810.

An approximate breakdown of the number of postdoctoral scholars and postgraduate researchers at each location is as follows:

Location Headcount
Berkeley 1,070
Davis 803
Irvine 340
Los Angeles 960
Merced 49
Riverside 235
San Diego 1,166
San Francisco 1,067
Santa Barbara 305
Santa Cruz 134
Total 6,130

*FTP Data, Oct. 2017