Chuck McConnell, the Energy Department’s assistant secretary for fossil energy, left the agency February 1. His deputy, Chris Smith, will serve as acting assistant secretary.

Senate Environment and Public Works Chairman Barbara Boxer hired Jeremy Symons as her new deputy staff director January 31. Mr. Symons, the senior vice president for conservation and education at the National Wildlife Federation, will focus on clean water, air quality, wildlife, climate change, and other environmental issues.