Dennis Dimick is the executive editor for environment at National Geographic Magazine.

He has a been a photo editor specializing in environment coverage since 1990. He has photo edited a dozen NGS books, including a 1996 book on the Endangered Species Act called The Company We Keep.

A September 2004 magazine project he proposed and oversaw on global climate change called Signs From Earth received a citation from the Overseas Press Club in 2007 for best enviromental coverage, and has been nominated by the Society of Environmental Journalists for best explanatory journalism. National Geographic stories he led that were published in June and October 2007 on melting ice, earth's carbon challenge, and prospects for biofuels received first place in the 2008 SEJ contest for best explanatory journalism.

Dimick lectures nationally on the emerging conflicts between energy use and climate change, and he co-organizes the annual Aspen Environment Forum with the Aspen Institute. He holds degrees in agriculture and agricultural journalism from Oregon State University and the University of Wisconsin-Madison.