John Marioni is a Senior Vice President and Head of Computation at Genentech Research and Early Development (gRED) in South San Francisco.
He continues to co-chair the Human Cell Atlas Analysis Working Group.
[4] Marioni has conducted influential studies in whole-tissue and single-cell transcriptomics.
He conducted postdoctoral studies in the University of Chicago under Matthew Stephens.
[6][7] Marioni is known for "pioneering the statistical analysis of gene expression patterns in individual cells, which has led to a radical paradigm shift in the field of transcriptomics.