Earn a Free Year of Membership with the Sigma Xi "Member-Get-A-Member" Promotion

Sigma Xi’s Member-Get-A-Member program gives all active Sigma Xi members a chance to earn a free year of membership by recommending five new members during a one-year period.

Here’s how it works:

Active Sigma Xi members should recommend their qualified friends, students, colleagues and fellow scientists and engineers to the honor of Sigma Xi membership. Any active Sigma Xi member who recommends five new members who are then approved for membership will receive one free year of Sigma Xi membership. 

Potential new members must list their Sigma Xi recommender on the “Recommended by” line at the bottom of their nomination forms. A “Recommended by” line has also been added to the online nomination form found here. The recommender’s name must be included on the nomination form to receive credit for the recommendation.

The following stipulations apply to the Member-Get-A-Member program:

  • The program is open to all active (dues-paid) Sigma Xi members.
  • The recommender does not have  to be a nominator but can  be one of the nominators. However, each new member can only be recommended by one Sigma Xi member, so both nominators can not  get credit for one individual.
  • All five new members must be approved, processed and paid during the same fiscal year (July 1 - June 30) to count toward the program.
  • Free membership will be credited to the recommender for the next fiscal year (July 1 – June 30) once membership for all five new members has been processed and paid in full. If the recommender has already paid for the next fiscal year of membership, credit will be given for the following fiscal year. Notification of free membership will be sent to the recommender by e-mail.
  • Each member who participates in the program can receive only one free year of membership, even if they recommend more than five nominees during one fiscal year.
  • Only members who actually recommend Sigma Xi membership to the new member will receive credit for a recommendation. All information will be verified by Sigma Xi staff.

Important Note to Chapter Officers

The goal of the Member-get-a-Member program is to increase nominations. Any recommendations offered by a chapter officer should be a supplement to the regular processes already established at the chapter for identifying potential new members. Recommendations do not have to come from the same institution or chapter as the recommender. Chapter officers may not claim free membership under this promotion as this is considered a conflict of interest. 

Questions? E-mail Membership Department at  or call 800-243-6534 or 919-549-4691.

Member Spotlight

Megan E. Wilhelm

Sociology doctoral student

Megan E. Wilhelm, who joined Sigma Xi in 2010, is a sociology doctoral student. She is studying educational settings in the hope that her findings can be used to produce more equitable learning environments for all students.