At a 2005 workshop, a senior official in the U.S. government’s Minerals Management Service raised concerns about ultra-deepwater drilling and included the bullet point, “Few or no regulations or standards.” Within two years, Jim Grant left his post as chief of staff of the government’s Gulf of Mexico region to take a job with BP PLC – one of the companies his former agency regulated in its oversight of offshore drilling.

Grant’s change is one example of the revolving door between the Interior Department’s MMS and the oil industry, which increasingly has the attention of Congress, the Obama administration and watchdog groups after the disastrous BP oil spill at an ultra-deepwater rig in the Gulf of Mexico.