The Van Lehn group will have openings for 1+ graduate students in Fall 2021. Details are the application process for consideration in the graduate program are available here: https://www.engr.wisc.edu/department/cbe/academics/phd-in-chemical-and-biological-engineering/. Note that individual professors do not admit students into the department. Admission is recommended by a faculty committee.
The Van Lehn group currently has no open postdoctoral positions.