ISM - National:                                                       http://www.ism.ws/about/?navItemNumber=4884

ISM Northern California Regional Events:  http://www.ismsv.org/asp/events_ism.asp   

APICS -  Sacramento Valley Chapter:    http://www.apicsacramento.com/

Strategic Procurement Solutions: http://www.strategicprocurementsolutions.com/index.html

Procurement Services Associates (PSA) http://procurementservices.com/Page_1.html