Aug 2020 to Present Associate Professor, Department of Earth and Environment, Florida International University, Miami, FL.
Sept 2017 to Aug 2020 Associate Professor, Department of Environmental and Interdisciplinary Sciences, Texas Southern University, Houston, TX.
Sept 2018 to June 2019 Fulbright Scholar -Sub-Saharan Africa, Department of Geomatics and Land Management, Makerere University, Kampala, Uganda.
Sept 2011 to Aug 2017 Assistant Professor, Department of Environmental and Interdisciplinary Sciences, Texas Southern University, Houston, TX.
Sept 2014 to Present Director, Environmental Toxicology Program, Department of Environmental and Interdisciplinary Sciences, Texas Southern University, Houston, TX.
June 2013 to Aug 2016 Visiting Summer Faculty, Oak Ridge National Lab (ORNL), Oak Ridge, TN.
July 2009 to Sept 2011 Research Scientist, Department of Geology, Bowling Green State University, Bowling Green, OH.
July 2004 to June 2009 Postdoctoral faculty, Department of Geology, Bowling Green State University, Bowling Green, OH.