Hester Bijl is a Dutch mathematician, professor, and the rector magnificus of Leiden University.

[1] In 1999, she started working the Delft University of Technology in the aerodynamics department.

[5] In 2013, she became dean of the faculty of aerospace engineering at the Delft University of Technology.

[3] In 2021, Bijl was appointed rector magnificus of Leiden University, succeeding Carel Stolker.

[7] Bijl is on the supervisory board of the Netherlands Organisation for Applied Scientific Research and on the board of the Leiden Bio Science Park.