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 6,593* 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 1,037
Davis 778
Irvine 406
Los Angeles 849
Merced 59
Riverside 226
San Diego 1,128
San Francisco 1,136
Santa Barbara 307
Santa Cruz 146
Total 6,593

*FTP Data, April 2021