Simons is board-certified in internal medicine and medical oncology. At Johns Hopkins, Simons completed a post-doctoral fellowship under Bert Vogelstein in human cancer molecular genetics prior to being appointed to the Hopkins medical school faculty in oncology and urology in 1991. On the Hopkins faculty, Simons chaired the Hopkins medical school Curriculum Committee for Oncology from 1990-2000. Simons' first independent laboratory research grant was from the Prostate Cancer Foundation in the Foundation’s first year of existence in 1993. Simons was recruited by Georgia Governor Roy Barnes, and the Robert W. Woodruff Foundation of Atlanta to be the Founding Director of the Winship Cancer Institute at Emory University and Chair of Hematology and Oncology at the Emory Clinic. Simons led the creation of the Georgia State Cancer Plan, Georgia’s tobacco settlement investment in cancer research and new faculty recruitment programs within the Georgia Cancer Coalition. Simons co-directed with Shuming Nie the National Cancer Institute Center for Cancer Nanotechnology Excellence at Emory and Georgia Institute of Technology. From 2000 to 2006, Simons was a Distinguished Service Professor of Hematology and Oncology at the Emory University School of Medicine, and Professor of Materials Sciences Engineering at the Georgia Institute of Technology. With Michael Milken, Chairman of the Board of FasterCures, Simons created the strategic plan and served as the interim chief science officer for the launch of the Melanoma Research Alliance. The Melanoma Research Alliance was founded by Debra and Leon Black in 2007. In 2011, Simons was inducted into the Johns Hopkins University Society of Scholars. The society inducts former postdoctoral fellows, postdoctoral degree recipients, house staff and junior or visiting faculty who have served at least a year at Johns Hopkins and thereafter gained marked distinction elsewhere in their fields.
Prostate Cancer Foundation
Simons has led the expansion of PCF’s Research Awards globally to 627 research awards including $187.0 million in funding to 159 teams of scientists working on human genetics, molecular oncology, genomic medicines, molecular imaging, and "precision immunotherapy". In 2008, 2011, and 2012, Simons launched new peer-reviewed research programs in the United Kingdom, China, and Ireland. The Prostate Cancer Foundation also increased its support for cancer researchers in Australia, Canada, and Greece through the PCF Hellenic Fund. In 2018, the PCF global enterprise now extends to 22 countries. When Simons joined the Prostate Cancer Foundation in 2007, he launched the “PCF 100”, with the goal of securing support for 100 Young Investigators. Each Young Investigator receives a three-year award and total grant amount of $225,000, which is matched dollar-for-dollar by his or her university. PCF has invested more than $53 million to support 255 young investigators since 2007. In 2016, as a part of Vice President Biden's Cancer Moonshot initiative, Simons announced a 5-year, Foundation-Government partnership with the Department of Veterans Affairs for a precision oncology clinical research and care program for every US veteran with prostate cancer in the VA. In 2020, Simons launched the Prostate Cancer Theranostics and Imaging Centre of Excellence at the Peter MacCallum Cancer Centre in Melbourne, Australia.