Present practice focuses on environmental, energy, administrative and constitutional law. He has appeared before various Congressional committees on legislation involving the Clean Air Act, the Clean Water Act, the Superfund Act, and National Environmental Policy Act, the Atomic Energy Act, the National Energy Act of 1978 (the Fuel Use Act and the Public Utility Regulatory Act portions), the Federal Criminal Code and regulatory reform. He has also represented industry participants in rulemakings by the Environmental Protection Agency (EPA), the Nuclear Regulatory Commission and in the Department of Energy implementing those acts and briefed and argued appeals and other test cases under them in the federal courts.