Marie D'Iorio is the Executive Director of the National Institute for Nanotechnology (NINT) in 2012. Prior to this, she served as Director General of the NRC Institute for Microstructural Sciences (NRC-IMS).

Dr. D'Iorio obtained a Ph.D. in solid state physics in 1982 from the University of Toronto. She then spent a year as a post-doctoral fellow at the IBM Zurich Research Laboratory in Switzerland working with Dr. Alex Müller on electron spin resonance in perovskite compounds.

In 1983, Dr. D'Iorio returned to Canada to join the National Research Council where she established the first very low temperature, high magnetic field laboratory in Canada to study low dimensional electron systems in semiconductor heterostructures. Working at the leading edge of this field, she uncovered novel experimental evidence for a metal-insulator phase transition in dilute electron systems of very high mobility semiconductor quantum wells. In 1998, Dr. D'Iorio initiated and coordinated a project on organic materials for displays. Over the years she has led the NRC-IMS Organic Materials and Devices group and was Director of Components Technologies at IMS.

Dr. D'Iorio has authored and co-authored 100 publications in refereed journals and conference proceedings and is the co-inventor of 3 patents. She has served on various national and international scientific committees, advisory groups and Boards of Directors, and has participated actively in professional associations, including serving as President of the Canadian Association of Physicists. Dr. D'Iorio is also an Adjunct Professor at the University of Ottawa's Department of Physics.