You can visit the Calpers web site at the link below. In the section "for members" , after confirming what type of member you are, you can then scroll to Member Home Loan, select "application process". from there you will be able to select "Loan officers". If all else fails, you can call CalPers at 1-800-874-7377
There are many lenders that say they are CalPERS Certified but have never closed a CalPERS loan. I would recommend using a direct CalPERS Lender and specifically someone who specializes in PERS loans. Preet Kalirai has been in the business for over 15 years and has helped thousands purchase and refinance. You can reach her at 1.888.415.2000 or callpreet.com . She is not in Orange county but can assist you from Sacramento if you are ok with that. I do know a good direct lender there as well if you want to meet in person. Just let me know.
Check with Jess Mendoza / OC Mortgage Connection at 714-264-5890. Along with CalPers, he has access to special Public Servant loans that allow seller contributions and in certain cases 30 year fixed rate loans with zero down payment.