Office of Personnel Management (OPM) data breach affected an estimated four million government employees, In June 2015, OPM discovered that the background investigation records of current, former, and prospective Federal employees and contractors had been stolen. OPM and the interagency incident response team have concluded with high confidence that sensitive information, including the Social Security Numbers (SSNs) of 21.5 million individuals, was stolen from the background investigation databases. This includes 19.7 million individuals that applied for a background investigation, and 1.8 million non-applicants, primarily spouses or co-habitants of applicants. Some records also include findings from interviews conducted by background investigators and approximately 5.6 million include fingerprints. Usernames and passwords that background investigation applicants used to fill out their background investigation forms were also stolen (Gootman, 2016). This paper will discuss how OPM uses teamwork with this data breach? This paper will also discuss what kind of leadership practices did OPM employ and what unique aspects of the company lead to success or failure.