Martin J. Head is a stratigrapher and Professor of Earth Sciences at Brock University, Ontario, and is a status-only full professor at the University of Toronto. He has a PhD from the University of Aberdeen and specializes in late Cenozoic dinoflagellate cysts, including their taxonomy, biostratigraphy, and use in paleoceanographic reconstructions. Head is currently Vice-Chair of the International Subcommission on Quaternary Stratigraphy (SQS), having served as its Chair (2012–2020), and is Co-Convener of its Working Group on the Middle–Upper Pleistocene Subseries Boundary. He is concurrently a voting member of the SQS Working Group on the Anthropocene and of the International Subcommission on Stratigraphic Classification, and an advisory board member of the INQUA Stratigraphy and Chronology Commission (SACCOM).