Becoming a Member

Since its founding in 1886, induction into Sigma Xi has been a milestone in hundreds of thousands of distinguished research science and engineering careers.  

About Sigma Xi Membership

  • Membership in Sigma Xi is by invitation (nomination).
  • Sigma Xi membership requires nomination by two Sigma Xi members.
  • Sigma Xi membership is not linked to the possession of any specific education degree.
  • Sigma Xi membership is not contingent upon belonging to some other organization.
  • Students and non-students follow the same review process for Sigma Xi membership.
  • Neither Sigma Xi, nor any chapter of Sigma Xi, shall discriminate against candidates for election to membership on the basis of race, religion, sex, age, national origin, sexual orientation or disability.

Sigma Xi Membership Categories

  • Full Membership.  An individual who has shown noteworthy achievement as an original investigator in a field of pure or applied science is eligible for election to Full Membership.
    • This noteworthy achievement must be evidenced by publication as the primary author (defined in the manner appropriate to the discipline) on at least two different articles published in a refereed journal, patents, or refereed monographs.
    • Dissertations and theses alone are not considered sufficient for demonstration of this achievement and must be accompanied by at least two other publications.
  • Associate Membership.  An individual who has conducted independent investigation and written a report concerning their research is eligible for election to Associate Membership.
    • This initial research achievement can be in a field of pure or applied science.
    • The individual is expected to later achieve the requirements for Full Membership.
  • Promotion to Full Membership.  Associate Members may be promoted to Full Membership once they satisfy the Full Membership qualifications.
    • Promotion review will follow the same procedure as the initial nomination.

    For additional details on Sigma Xi membership, click here to access the Clarification Policy.

How Do I Become a Sigma Xi Member?

  • Through the Committee on Qualifications on Membership (CQM).  If you wish to self-nominate for membership or have one Sigma Xi nominator, you can request that the Sigma Xi Committee on Qualifications on Membership review your application for membership.
  • Through a local Sigma Xi Chapter.  If a Sigma Xi chapter is located in your local area, you can request that Chapter’s officers review your Sigma Xi nomination.
    • Click here to find a local Sigma Xi chapter.
    • Click here to download the nomination form that you can complete and give to your local Sigma Xi Chapter officer.
    • Questions?  Email chapters@sigmaxi.org.

NOTE:  Please only submit your nomination once - either through CQM or local chapter.  If you submit your nomination in both places, you will impede the processing of your membership. 

New Member Dues Rates

Click here to view the Sigma Xi new member dues rates.

Please note that new Initiates who are inducted in January through June 2017 will be charged fees for FY2018 (July 1, 2017–June 30, 2018). The first year of membership will be active from the time you join until June 30, 2018.

Sigma Xi Affiliate Circle

Sigma Xi chapters and individuals are encouraged to nominate students who don't qualify for associate membership to the Sigma Xi Affiliate Circle as a first step in their professional careers. The Affiliate Circle is also open to anyone who supports research and Sigma Xi's mission. Learn more about the Affiliate Circle.

Member Spotlight

Siddharth Tripathi

Postdoctoral research associate

Siddharth Tripathi (SX 2013)* is a using natural compounds to find new treatments for fungal infections.


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