Senate Committee on Environment and Public Works Chairwoman Barbara Boxer (D-Calif.) has added a climate change counsel to her committee staff.

Boxer said Thursday that environmental attorney Joe Mendelson would fill the newly created role. Mendelson was most recently policy director of climate and energy with the National Wildlife Federation.

“Dangerous climate change poses an urgent threat and we have a responsibility to address that threat. I am so pleased that Joe Mendelson will be joining the Senate Environment and Public Works Committee team. We will make the most of his expertise as we craft solutions to climate change,” Boxer said in a statement.

Boxer’s office said Mendelson “played a key role” in the 2007 Supreme Court decision that allowed the Environmental Protection Agency to regulate greenhouse gas emissions.