The National Mining Association will welcome Ryan Jackson as senior vice president of government affairs.

Bloomberg reported that Jackson spent the previous three years working at U.S. Environmental Protection Agency (EPA) Administrator Andrew Wheeler’s chief of staff.

“Mr. Jackson’s in-depth knowledge of the issues and nearly 20 years of working in the U.S. Senate demonstrate a reputation for persistence, integrity, working in a bipartisan fashion,” said Ashley Burke, a spokeswoman for the association.

The EPA has oversight over many issues tied to mining, including the cleanup of old sites and water impacts tied to extracting coal and other minerals. The agency also regulates air pollution from power plants burning coal, and under President Donald Trump it has sought to ease mandates blamed for discouraging electric sector reliance on the fossil fuel.

Because of Jackson’s government post, he will be restricted from lobbying the administration for five years and will focus solely on congressional advocacy, Burke said.

Jackson joined the EPA after working for Senator Jim Inhofe, an Oklahoma Republican, and was counsel to the Senate Environment and Public Works Committee. His tenure as chief of staff began under the former EPA administrator, Scott Pruitt.