David C. Kehoe

High Sierra Energy, LP acquires, manages, and integrates businesses & revenue generating assets in the natural resources industry. The company was founded by James J. Burke, III in 2004 and is headquartered in Denver, CO.

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.

TransMontaigne GP LLC provides management consulting services. The firm is also engaged in petroleum fuels logistics services. The company was founded on May 19, 2005 and is headquartered in Denver, CO.

NGL Crude Logistics LLC provides physical distribution, merchandising and trading services. The company was founded on April 24, 2002 and is headquartered in Houston, TX.

TransMontaigne Partners LLC engages in the provision of integrated terminaling, storage, transportation, and related services. Its clients include companies engaged in the distribution and marketing of light and heavy refined petroleum products, crude oil, chemicals, fertilizers, and other liquid products. The Light refined products include gasolines, diesel fuels, heating oil, and jet fuels. The Heavy refined products include residual fuel oils and asphalt. It operates through the following segments: Gulf Coast Terminals; Midwest Terminals and Pipeline System; Brownsville Terminals; River Terminals; Southeast Terminals and West Coast Terminals. The company was founded i February 2005 and is headquartered in Denver, CO.