Bryan Killian is a trial and appellate litigator who focuses on complex and high-value matters throughout the United States. He has argued in almost every federal court of appeals.

Throughout his career, Bryan has had a central role in high-profile environmental matters. He briefed the US Court of Appeals for the DC Circuit litigation challenging US Environmental Protection Agency’s regulation of stationary-source greenhouse gas emissions. He challenged the constitutionality of California’s low carbon fuel standard on behalf of out-of-state fuel producers. He represented one of the owners of the oil well involved in the Deepwater Horizon disaster. And he represents defendants in climate-change suits brought by state and local municipalities. Bryan also regularly briefs and argues on behalf of the domestic biofuels industry in state and federal cases related to the federal Renewable Fuel Standard.