He is currently the president of Stanford, but he has been accused of faking images in scientific papers or not noticing that someone on his team faking images.

https://www.science.org/content/article/stanford-misconduct-probe-president-stumbles-new-journal-launches-inquiry

If he is still president of Stanford at the end of 2023, but has announced intent to resign/step down (for any reason), this resolves to yes. 

Will Marc Tessier-Lavigne not be president of Stanford or announce intent to resign by the end of 2023?

 → Will Marc Tessier-Lavigne no longer be president of Stanford and/or announce intent to resign by the end of 2023?

Will Marc Tessier-Lavigne no longer be president of Stanford and/or announce intent to resign by the end of 2023?

 → By the end of 2023, will Marc Tessier-Lavigne no longer be president of Stanford and/or announce intent to resign?