Before joining Enbridge, Mr. Letwin was, among others, Senior Vice President and Chief Financial Officer with TransCanada PipeLines Limited and, prior to that, President and Chief Financial Officer of Numac Energy Inc. In 1999, he was appointed President and Chief Operating Officer of Enbridge Energy Services until 2001 when he was appointed Group Vice President, Distribution and Services of Enbridge.

In 2003, Mr. Letwin was appointed Group Vice President, Gas Strategy & Corporate Development, Enbridge. On May 1, 2006, Mr. Letwin was promoted to the position of Executive Vice President, Gas Transportation and International. He has overall responsibility for Enbridge Energy Partners, L.P. and is responsible for all of Enbridge’s natural gas operations, including the Alliance and Vector natural gas pipelines. In addition, he has oversight of Enbridge Gas Distribution Inc., Enbridge Gas New Brunswick Inc. and of the International Business unit, including Enbridge Technology Inc.