Susan F. Tierney, former assistant secretary for policy at the U.S. Department of Energy, has joined The Economics Resource Group, Inc. as a managing consultant.
UGI Corp. has hired William D. Katz as v.p.-corporate development. He succeeds R. Paul Grady, now v.p.-sales/
operations of UGI's AmeriGas Propane subsidiary.
Stephen D. Chesebro', Tenneco Energy's CEO, was promoted to chairman. Edward J. Casey, Jr. joins the company as president and COO.