Rob Semper joined the Exploratorium in 1977. Over the years he has had a career developing exhibits and exhibitions onsite and worldwide, creating teacher education programs, producing publications, films, online media and communication programs, expanding the informal science education field and leading major initiatives including the recent relocation of the institution to Pier 15/17. Currently as Chief Science Officer, Rob provides strategy and oversight to the science and science education work of the Exploratorium and represents the Exploratorium to the broader world of science, science centers, and STEM education. As Senior Director of Educator Engagement, Rob is also responsible for developing and leading the institutional strategy for educator learning programs. Rob is the author of many journal articles and invited papers and conference talks, and he has been Principal Investigator on over 50 federally and privately funded projects that include developing new online and media resources, experiments using technology to enhance the museum visitor experience, and programs for teachers and museum educators. In 2018, Rob was selected as a member of the Federal STEM Education Advisory Panel, which meets twice a year to evaluate and offer guidance on the federal government’s strategic plan for STEM education. Awards include APS Fellow 2019; AAAS Fellow, 2006; and the NSTA 2006 Faraday Science Communicator Award. Before joining the Exploratorium, Rob taught physics and conducted solid state, elementary particle and nuclear physics research. He received his PhD in solid-state physics from the Johns Hopkins University.