Curtis Dinan is senior vice president, chief financial officer and treasurer of ONEOK, Inc. and ONEOK Partners L.P., and is a member of the ONEOK Partners' board. Previously, he was senior vice president and chief accounting officer of ONEOK, responsible for accounting, financial reporting and tax compliance. He joined ONEOK in February 2004, after being an audit partner with both Arthur Andersen LLP and Grant Thornton LLP.

Dinan is a member of the American Institute of CPAs, the Oklahoma Society of CPAs and is an advisory board member for the Breech School of Business at Drury University. He is also a past president, treasurer and director of Tulsa Court Appointed Special Advocates, a graduate and past treasurer and director of Leadership Tulsa, past treasurer and director of the Child Abuse Network, and a graduate of Leadership Oklahoma.

A Missouri native, Dinan earned accounting and business administration degrees from Drury University in Springfield, Missouri, in 1989.