Katarzyna A. Rejniak (?Kasia?), Ph.D. is a one of the founder members of the Integrated Mathematical Oncology Department at the Moffitt Cancer Center. She joined Moffitt faculty in 2008 after completing two postdoctoral fellowships, first at the NSF-funded Mathematical Biosciences Institute at the Ohio State University; and second as a joint postdoc at the Dundee University in Scotland and the Vanderbilt Integrative Cancer Biology Center in Nashville. She received MSc degree in mathematics and computer science from Gdansk University in Poland, and Ph.D. in applied mathematics from Tulane University in New Orleans, Louisiana, in 2002. Kasia specializes in mathematical modeling of complex interactions between tumor cells and tumor microenvironment, especially she is investigating how the heterogeneous microenvironments influence tumor response to anticancer treatments, and how tumor stroma and tumor tissue is penetrated by drug molecules, imaging agents and various metabolites.