[1][2] He is an author of the Simply Statistics blog, and runs several online courses through Coursera, as part of their Data Science Specialization.

Then went on to study at the University of Washington achieving a Master's degree in 2005 and completed a PhD in Biostatistics in 2007 with John Storey as his doctoral advisor.

[2][7] Leek joined Johns Hopkins University as an assistant professor in Biostatistics in 2009, working at the Bloomberg School of Public Health.

[8] Leek works in The Center for Computational Biology[9] at Johns Hopkins University creating statistical packages[10][11] for analysis of genomes.

He is an expert in reproducibility, and his work and opinions have been published in notable scientific and medical journals such as Nature[15][16] and the Proceedings of the National Academy of Sciences.