Since 1937 Sigma Xi has presented its Distinguished Lecturers. This is an opportunity for chapters to host visits from outstanding individuals who are at the leading edge of science.

Lecturers communicate their insights and excitement to a broad range of scholars and to the community at large. Each year thousands of Sigma Xi members, students and the public have an opportunity to hear exceptional talks and to ask questions of experts. 

The Lectureship Program is supported by Sigma Xi members with additional support from partnering organizations like the American Meteorological Society, the National Academy of Engineering and the National Cancer Institute.

Click here for information on how to nominate or become a lecturer.

For more information, send an email tolectureships@sigmaxi.org. 
To sponsor a lectureship, please email Lisa Merritt, Sigma Xi's Development Director, atlmerritt@sigmaxi.org.

2025-2026 Lecturers
2024–2025 Lecturers
2023-2024 Lecturers
2022-2023 Lecturers
2021-2022 Lecturers
2020-2021 Lecturers
2019-2020 Lecturers
2018-2019 Lecturers
Past Lecturers

Watch online Q & A sessions with Distinguished Lecturers

Please join Sigma Xi and American Scientist for online question-and-answer sessions with Sigma Xi Distinguished Lecturers. These sessions offer the opportunity to hear a researcher talk about his or her work. The sessions are held online and broadcast live. 

Past Recorded Q & A Sessions