Let's look at Obama's current Secy of the Interior:  From the Interior Website.

"Prior to her confirmation, Secretary Jewell served in the private sector, most recently as President and Chief Executive Officer of Recreation Equipment, Inc. (REI). Jewell joined REI as Chief Operating Officer in 2000 and was named CEO in 2005. During her tenure, REI nearly tripled in business to $2 billion and was consistently ranked one of the 100 best companies to work for by Fortune Magazine.
Before joining to REI, Jewell spent 19 years as a commercial banker, first as an energy and natural resources expert and later working with a diverse array of businesses that drive our nation's economy. Trained as a petroleum engineer, Jewell started her career with Mobil Oil Corp. in the oil and gas fields of Oklahoma and the exploration and production office in Denver, Colo"