I think the Job Fair is April 7th. I just looked all over the USAP.gov website and didn’t find anything as well. They changed the website last year and to be honest I’m surprised how hard it is to find the job fair info. I’m pretty sure it’s there.
What I did find was the address and phone number. I bet if you call you can get the date.
7400 South Tucson Way
Mail Stop 22
firstname.lastname@example.org&subject=Information About RPSC