Become a Member

Membership in Sigma Xi is by nomination and is conferred in one of two ways:

Full Membership

Conferred upon any individual who has shown noteworthy achievement as an original investigator in a field of pure or applied science or engineering.

Associate Membership

Available to any individual who has, through initial research achievement in a field of pure or applied science or engineering, shown an aptitude for research. Please see the Qualifications for Membership for more information. Students and non-students follow the same review proccess.

Individuals who were previously elected as an Associate Member and who now meet the requirements for Full Membership can apply for promotion to Full Membership.

To request nomination through the UC Sigma Xi Chapter do one of the following:

  1. Contact Sarah Pixley at or Kevin Haworth at
  2. Download and fill out either this Word or PDF nomination form and present it to any chapter officer, who will get it to the Membership Committee.
  3. Apply online through the National Office of Sigma Xi. This approach will still require support of your application from two Full Members (and you will need their membership IDs).  Please reach out to Sarah Pixley for assistance in finding members to support your nomination or refer to our membership page.