When the new year arrives for Arizona Public Service Co., with it will come a new president after a longtime voice president was promoted within the state’s largest utility.

Having previously served as the executive vice president of public policy for APS, Jeff Guldner will fill the role previously filled by Don Brandt, who is also the chairman and CEO of the utility.

Guldner will take over all aspects of APS’ operation except oversight of Palo Verde Nuclear Generating Station, which Brandt will continue to manage. APS is the lone subsidiary of Pinnacle West Capital Corp.

“Jeff’s legal and public policy experience, and his deep understanding of complex issues facing our state have been valuable assets to APS,” said Brandt, who is chairman, president and CEO of Pinnacle West.

Having joined the APS in 2004, Guldner is a lawyer by trade and previously served as a partner at Snell & Wilmer LLP in Phoenix.

With a bachelor’s degree, a law degree, time serving in the U.S. Navy as a surface wartime officer and teaching naval history at the collegiate level, Guldner has a diverse background.

“APS is a great company with a bright future and a long history of service to Arizona,” Guldner said. “I’m grateful to Don for his support, confidence and continuing leadership. As I take on these new responsibilities, I’m fortunate to be surrounded by a talented and experienced team at APS.”

With service as chairman of the East Valley partnership and on the boards of the Greater Phoenix Economic Council and the Arizona Theatre Co., he is also an active member of the community.

The company also announced the election of James Trevathan to the boards of Pinnacle West and APS. Trevathan is retiring this month from Waste Management Inc. after a 40-year career.