McKinsey & Company, Inc.

McKinsey & Company, Inc. provides advice on strategic management to corporations, governments, and other organizations around the world.

Engelhardt & Co. LLC

Engelhardt & Co., LLC is a San Diego, California-based company whose principal is Jamie Barbary aka Jamie Engelhardt. Its stated purpose in its incorporation papers is non-specific.

Booz Allen Hamilton Holding Corporation

Booz Allen Hamilton Holding Corporation is an American management consulting firm that provides engineering, analytical, digital, mission operations, and cyber solutions as well as management and technology consulting. It purportedly offers these services to governments, corporations, and not-for-profit organizations, but it derives a majority of its income from the US government.