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About Alliance Investigations, LLC

Investigator Profile

As a retired Federal Agent with over 28 years of law enforcement experience, Mike Duncan is a State Licensed Private Investigator (Lic. A14921) specializing in infidelity investigations, corporate surveillance and pre-employment screening for companies and volunteer organizations.
Mike is an extremely qualified private investigator with strong surveillance, tactical, training, interviewing, and fire investigative skills.


  • Corporate security training for Fortune 500 international corporations.
  • Bureau of Alcohol, Tobacco, and Firearms and Explosives, Dallas, TX
Senior Special Agent
  • Certified Explosives Specialist
  • Top Secret Security Clearance
  • Eleven years on the Special Response Team
  • Supervised Operation Exile Firearms Task Force involving Federal, State, and Local law enforcement
  • Secret Service protection details for each president from Gerald Ford to George W. Bush. Protection details for U.S. Department of State.
  • BBA in Accounting, University of Texas at Arlington, 1978
  • BBA in Business Management, SFA
Professional Awards
  • Bureau of Alcohol, Tobacco and Firearms, Distinguished Service Award
  • Bureau of Alcohol, Tobacco and Firearms, Hostile Action Award
  • Three United States Treasury Special Act Awards
  • Texas Association of Licensed Investigators (TALI)
  • Karate Black Belt, 3rd Degree

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