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  史蒂芬?约翰逊先生于1951年3月21日出生在华盛顿。在印地安那州泰勒大学获得生物学学士，随后在乔治华盛顿大学病理学专业获得硕士学位。约翰逊在美国环保局工作24年，于2005年5月2日宣誓就任美国环保局第十一任局长，他所设想的职位目标是推动和保持科学的应用，并通过合作创新的方法寻求环境问题的解决之道。

约翰逊在担任局长之前，曾任美国环保局代理局长（自2005年1月），副局长（2004年8月-2005年1月），及代理副局长（2003年7月-2004年8月）。

Mr. Johnson was born on March 21, 1951 in Washington, DC. He received a B.A. in Biology from Taylor University in Indiana and an M.S. in Pathology from George Washington University, Washington, DC.

Stephen L. Johnson has been a part of the EPA for 24 years. He was sworn in as the 11th Administrator of the U.S. Environmental Protection Agency on May 2, 2005. He assumed the position with the stated goal of promoting and maintaining the utilization of sound science while using collaborative, innovative approaches to solving environmental problems.

Prior to becoming Administrator, Mr. Johnson had served as the Acting Administrator (since January 2005), Deputy Administrator (from August 2004 to January 2005) and Acting Deputy Administrator of the Agency (from July 2003 to August 2004).

He was Assistant Administrator of EPA’s Office of Prevention, Pesticides, and Toxic Substances (OPPTS) from June 2001 to July 2003