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Deborah S. Fleming

Trustee, Executive in Residence for Energy Programs, Adjunct Professor of Finance

Energy Management
Board of Trustees



M.B.A. in Finance, The University of Tulsa
B.S.B. in Finance, Oklahoma City University
Chartered Financial Analyst (CFA)
Certified Treasury Professional (CTP)

Areas of Expertise

Debbie Fleming most recently served as vice president and treasurer of SemGroup Corporation and Rose Rock Midstream in Tulsa. She joined SemGroup in 2010 and was responsible for the refinancing of the company after it emerged from a very public and complex bankruptcy. In 2011, Fleming financed, and assisted in, the initial public offering of Rose Rock Midstream, the company’s MLP, comprised of domestic crude oil storage and marketing assets. She was also responsible for the company’s corporate finance, banking, cash management, and insurance functions. Fleming completed this assignment in February 2012.

Before joining SemGroup, Fleming was vice president and treasurer of OGE Energy Corporation where she was responsible for the corporate finance group encompassing treasury and banking operations, cash forecasting, financial planning, business unit budgeting, investor relations, and pension plan/401-K oversight. Fleming also gained experience as the assistant treasurer and other corporate financial roles during her 18 year career with for Williams. Her primary responsibilities were for the bank and rating agency relationships, all debt and equity product structuring and negotiations, debt compliance, cash flow forecasting, capital markets derivatives and FX decisions along with investments and plan options for the company’s pension and 401K plans.

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