Rose Rock Midstream Announces New Board Member

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TULSA, Okla., Dec. 6, 2012 (GLOBE NEWSWIRE) -- Rose Rock Midstream, L.P. (NYSE:RRMS) announced today that Robert E. Dunn has been elected as the newest member of the Rose Rock Midstream Board of Directors, effective immediately.

"We are extremely pleased to welcome Robert to our board," said Norm Szydlowski, CEO of Rose Rock Midstream. "With nearly 40 years of experience in the energy industry, he will provide a knowledgeable and valuable perspective on the company's business and growth plans."

Mr. Dunn currently serves as president and chief executive officer of Prism Midstream LLC. In 2000, he founded Prism Gas Systems. That company was acquired by Martin Midstream Partners in 2005, where he continued as senior vice president until 2012. From 1982 to 1999, Mr. Dunn was employed by Union Pacific Resources, an independent oil and gas exploration and production company, last serving as vice president of gathering and processing. He began his career in 1975, working as an engineer for Texas based Brown & Root, Inc. Mr. Dunn has a master's degree in business administration from Harvard Business School and a bachelor of science degree in civil engineering from the University of Tennessee.

About Rose Rock Midstream

Rose Rock Midstream, L.P. (NYSE:RRMS) is a growth-oriented Delaware limited partnership formed in 2011 by SemGroup® Corporation (NYSE:SEMG) to own, operate, develop and acquire a diversified portfolio of midstream energy assets. Rose Rock Midstream provides crude oil gathering, transportation, storage and marketing services. Headquartered in Tulsa, OK, Rose Rock Midstream has operations in six different states with the majority of its assets strategically located in or connected to the Cushing, Oklahoma crude oil marketing hub.

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CONTACT: Investor Relations: Alisa Perkins, 918-524-8081 Media: Liz Barclay, 918-524-8158

Source:Rose Rock Midstream