In June 2005, a confidential informant (CI) telephoned the U.S. Department of the Interior (DOI), Office of Inspector General (OIG), to report that the Minerals Management Service (MMS), Minerals Revenue Management (MRM), had hired two retired Senior Executive Service (SES) MMS employees for high, six-figure salaries. After an initial referral to MMS, we opened an official investigation of this matter in March of 2007 when additional information came to our attention during a separate MMS investigation.