President Obama said he will nominate the Environmental Protection Agency’s (EPA) acting deputy chief to take the position officially.

Stan Meiburg came back to the EPA as its acting deputy administrator in October. He had worked at the agency for nearly four decades before retiring earlier in 2014 as the head of the EPA’s Atlanta office. Meiburg would replace Bob Perciasepe, who was deputy administrator throughout the Obama administration until he resigned last year. Lisa Feldt briefly acted in the number two spot before Meiburg came back.

“His experience spans the agency, having worked closely on air, enforcement, toxics, operations and countless other EPA issues,” EPA head Gina McCarthy said in October. “He’s literally done it all, and I know he’ll be a great addition to the team.”

Meiburg is the first Senate-confirmed EPA nominee Obama has named since Republicans took control of the Senate.