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Mark Mansfield Named Vice President Of Generation For UNS Energy

Mark Mansfield has been named Vice President of Generation for UNS Energy Corporation (NYSE: UNS).

Mansfield, 57, will succeed Andy Hoekstra, 64, who will retire from his position as Vice President of Generation for UNS Energy by the end of the year. Mansfield will oversee power plants operated by subsidiaries Tucson Electric Power (TEP) and UniSource Energy Services, and will report to Michael DeConcini, Senior Vice President of Operations.

“Mark is an experienced leader whose strong, steady oversight has already contributed to the success of our generating fleet,” DeConcini said. “In his new role, he’ll be responsible for maintaining our company’s strong record of safe, reliable and environmentally responsible power plant operations.”

Mansfield has served as Senior Director of Generation at TEP, managing the operations of the H. Wilson Sundt Generating Station and other local generating resources. He also has overseen TEP’s interest in remote plants co-owned with other utilities, including the gas-fired Luna Energy Facility and three coal fired plants, the San Juan, Navajo and Four Corners Generating Stations.

Before coming to TEP in June 2008, Mansfield served as Vice President of Thermal Operations for PacifiCorp Energy, a Salt Lake City-based utility that serves approximately 1.7 million customers in six western states. Including his previous leadership positions at PacifiCorp, Mansfield has more than 15 years of experience as a power plant manager and more than 25 years of experience in generation maintenance, operations and engineering. He holds a Bachelor of Science in Mechanical Engineering from Brigham Young University and a Master of Business Administration from the University of Utah.

UNS Energy is a Tucson, Arizona-based company with consolidated assets of approximately $4.0 billion. UNS Energy's primary subsidiaries include Tucson Electric Power, which serves more than 404,000 customers in southern Arizona, and UniSource Energy Services, provider of natural gas and electric service for about 240,000 customers in northern and southern Arizona. Visit for more information about UNS Energy and its subsidiaries.

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