Stephen King received his Ph.D. in Environmental Sciences, with an emphasis in toxicology at the University of Texas School of Public Health in Houston, Texas. He also holds a Master of Divinity degree from the Houston Graduate School of Theology and Master of Public Health degree from the University of Texas School of Public Health.

Dr. King has served as a member of a United States Environmental Protection Agency sponsored task force of experts and environmental and pollution officials from the City of Houston and Harris County, Texas, in examining the sources and extent of the pollution of Buffalo Bayou in the greater Houston area. He also served a one year term as president of the Lone Star Chapter (Texas) of the Society for Risk Analysis. In addition to serving on the board of CLEAN he serves on the Texas Cancer Pain Initiative.

Currently, Dr. King works in Houston as a toxicologist and epidemiologist.