• Founder and Director of The Institute of Environmental and Human Health (TIEHH) at Texas Tech University (1997-Present); Founding Chair and Professor, Department of Environmental Toxicology, Texas Tech University (Institute Faculty, Adjunct Faculty, Staff, Research Cooperators, Graduate Students – 200; 150,000 square feet Physical Plant and multi-million dollar annual budget)
  • Founder and Director of The Institute of Wildlife and Environmental Toxicology (TIWET) at Clemson University (1989-1997)
  • Founding Department Head (1989-1995) and Professor (1989-1997) in the Department of Environmental Toxicology at Clemson University
  • Founding Director, Institute of Wildlife Toxicology, and Professor of Environmental Toxicology, Huxley College of Environmental Studies, Western Washington University (1980-1989)
  • Past-President of the Society of Environmental Toxicology and Chemistry (SETAC), and has served on its Board of Directors and Executive Committee, as well as being Vice-President, on the SETAC Foundation for Environmental Education Board of Directors, and was the Annual Review Editor and currently Terrestrial Toxicology Editor of the journal, Environmental Toxicology and Chemistry
  • Authored more than two hundred refereed journal and technical articles, and published or edited books including, Toxic Substances in the Environment, Wildlife Toxicology, Wildlife Toxicology and Population Modeling: Integrated Studies of Agroecosystems, Principles, Principles and Processes for Evaluating Endocrine Disruption in Wildlife, A Probabilistic Aquatic Ecological Risk Assessment of Atrazine in North American Surface Waters and Perchlorate Ecotoxicology
  • Made more than 200 public and scientific presentations in the field of wildlife and environmental toxicology
  • As Principal Investigator have received 138 research grants totaling more than 45 million dollars
  • Graduated 31students at the graduate level, including M.S. and Ph.D. degrees
  • Authored ten courses in environmental toxicology and wildlife toxicology
  • Received the 2003 Outstanding Researcher Award, College of Arts & Sciences, Texas Tech University
  • "Award of Appreciation" from United States Environmental Protection Agency for service related to Chairmanship of the EPA Scientific Advisory Panel for implementation of the Federal Insecticide, Fungicide and Rodenticide Act and the Food Quality Protection Act of 1996, January 2004. Served as Chairman, January 1999 to December 2002.
  • Received the 1996 Alumni Research Award for outstanding faculty research at Clemson University
  • Received the 1987 Paul J. and Ruth Olscamp Research Award, from Western Washington State University
  • In 1996, addressed the United Nations Committee on Sustainable Development, United Nations, New York
  • Awarded a Fulbright Fellowship in 1991
  • Serve as an environmental advisor to the United States Justice Department, Environmental Enforcement Section
  • National Board/Committee Appointments (representative past and present):
  • United States Environmental Protection Agency’s, Science Advisory Panel (Member 1995-December 2002. Chair January 1999 – December 2002.)
  • United States Environmental Protection Agency’s, Joint SAB/SAP Review on “Data from Testing of Human Subjects” served as Chairman (1998-2000)
  • United States Environmental Protection Agency’s, Science Advisory Board, Mercury Review Subcommittee (1997)
  • The National Academy of Sciences’, Ecological Risk Assessment Subcommittee, Committee on Risk Assessment Methodologies (1990-1991)
  • Certificate of Appreciation from the National Academies, Board of Environmental Studies and Toxicology for service on the Committee on Superfund Site Assessment and Remediation in the Coeur d'Alene River Basin, 2003-2005
  • The Endocrine Disruptors Screening and Testing Advisory Committee (EDSTAC) of the USEPA (1996-1998)
  • Board of Research Directors of the Canadian Network of Toxicology Centers for the Canadian Government (1993-1999)
  • Consulted with many foreign countries on environmental issues (e.g., Russia, Costa Rica, Canada, the Netherlands, France, United Kingdom, Portugal, Switzerland)
  • Graduated with honors from the University of South Carolina, and received his M.S. degree from Clemson University and his Ph.D. from Virginia Polytechnic Institute and State University, and received a United States Environmental Protection Agency post-doctoral traineeship at the Massachusetts Institute of Technology