Ronald Ballschmiede

Chicago Bridge & Iron Co. NV provides services, including conceptual design, technology, engineering, procurement, fabrication, modularization, construction, commissioning, maintenance, program management and environmental services to customers in the energy infrastructure market throughout the world, and is a provider of diversified government services. It operates through the following segments: Engineering and Construction; Fabrication Services; Technology; and Capital Services. The Engineering and Construction segment provides engineering, procurement, and construction for energy infrastructure facilities, as well as integrated maintenance service. The Fabrication Services segment provides fabrication of piping systems, process and nuclear modules, and fabrication and erection of storage tanks and pressure vessels. The Technology segment provides licensed process technologies, catalysts, specialized equipment, and engineered products. The Capital Services segment provides maintenance services, environmental engineering and remediation, infrastructure EPC services, program management, and disaster response and recovery for private-sector customers and governments. The company was founded in 1889 and is headquartered in The Hague, Netherlands.

SemGroup LLC engages in the transportation, storage, distribution, market and other midstream services. It offers services for end-users and consumers of crude oil, natural gas, natural gas liquids and refined products. The company was founded in February 2000 and is headquartered in Oklahoma City, OK.

Rose Rock Midstream LP owns, operates, develops and acquires a diversified portfolio of midstream energy assets. The firm is engaged in the business of crude oil gathering, transportation, storage, distribution and marketing in Colorado, Kansas, Louisiana, Montana, New Mexico, North Dakota, Oklahoma, Texas and Wyoming. It operates through four segments: Supply and logistics, Corporate and Other, Transportation and Facilities. The company was founded on August 5, 2011 and is headquartered in Tulsa, OK.

Deloitte & Touche LLP engages in the provision of audit, advisory, financial advisory, tax, and consulting services. The company was founded on March 7, 1995 and is headquartered in New York, NY.

Arthur Andersen LLP used to provide accounting services. It was also into consulting services for clients that operate businesses throughout the United States and around the world. Arthur Andersen was founded in 1913 and was headquartered in Chicago, IL.

Part of Energy Transfer LP, Rose Rock Midstream GP LLC operates and manages a diversified portfolio of midstream energy assets. The private company is based in Tulsa, OK.