John Marion Tierney (born March 25, 1953) is an American journalist and author who has worked for the New York Times since 1990. A self-described contrarian, Tierney is a critic of environmentalism, the "science establishment", big government, and calls for limiting emissions of carbon dioxide.
Tierney was born in 1953 outside Chicago, grew up in "the Midwest, South America and Pittsburgh." He graduated from Yale University in 1976. As of 1998, he was married to Dana Tierney, with whom he had one child, Luke.
After graduating from college, Tierney was a newspaper reporter for four years, first at the Bergen Record in New Jersey and then at the Washington Star. Starting in 1980, he spent ten years in magazine journalism writing for such magazines as Atlantic Monthly, Discover, Esquire, Health, National Geographic Traveler, New York, Newsweek, Outside, Rolling Stone. Tierney began working at The New York Times in 1990 as a "general assignment" reporter in the Metro section. Tierney writes a science column, Findings, for the Times. He previously wrote the TierneyLab blog for the Times. In 2005 Tierney began to write for the Times Op-Ed page and as of 2015 his writings appeared in both the Times Op-Ed and "Findings" science column. He also writes for the conservative City Journal.
Tierney described his TierneyLab as "guided by two founding principles"