Morristown-based Covanta Energy announced today it has appointed Bradford J. Helgeson executive vice president and chief financial officer, effective immediately.

According to the announcement, Helgeson has been Covanta's vice president and treasurer since 2007, and previously held senior financial positions at Waste Services Inc., a publicly-traded environmental services company with operations in the U.S. and Canada, and worked in investment banking with Lehman Brothers and Donaldson, Lufkin & Jenrette.

Helgeson will replace Sanjiv Khattri, who will be actively assisting in the transition "prior to moving on to his next endeavor," chief executive Anthony Orlando said in a statement.