McMahon & Associates Private Investigators
Private Detectives

The Firm


Rory McMahon
Rory McMahon

Rory J. McMahon

Between 1978 and 1991, Rory J. McMahon was a Federal Probation officer in the Southern Districts of New York and Florida.  During his career, he investigated and supervised numerous career criminals, including major white collar and fraud specialists, large scale narcotics traffickers, and organized crime members and associates.   This experience enabled him to become proficient in many areas of investigation, including financial, surveillance, undercover procedures and working with substance abusers.

Between 1990 and 1998, Rory was an Instructor and Department Chair of the Private Investigative Services Program at City College, a private accredited Junior College in Ft. Lauderdale.  In that capacity, he authored seven books on investigations, which have been used in the program.  Rory is the author of two textbooks about investigation, Fraud Investigations – A Textbook on How to Conduct White Collar Crime and Financial Fraud Investigations, 3rd Edition (2018), and, Practical Handbook for Professional Investigators, 3rd Edition (2013).

From 1991 to the present, Rory J. McMahon has been the President of R.J. McMahon and Associates, Inc. He was a founding father of the Florida Association of Licensed Investigators.  He is the former Southeast Region Director for the National Association of Legal Investigators (NALI).   In 1997, he passed the rigid requirements to become certified as a Legal Investigator.  In 1999, he became a Florida Certified Investigator through the FALI.  In January, 2000 Rory was recognized as a Board Certified Criminal Defense Investigator by the Criminal Defense Investigation Training Council.  He was also named to their Board of Directors.  Presently, Rory is undergoing training and certification in Computer Forensics.

In June, 2005 Rory, after one year of diligent study, passed the difficult examination for Certification as a Fraud Examiner (CFE); and was so designated by the Association of Certified Fraud Examiners.   This new certification further enhances his credentials and standing as one of the premier fraud investigators in the world.



Ron Jones

Following receipt of a degree in Criminal Justice, Carl R. (Ron) Jones, Jr. embarked on what would be an extraordinarily successful 45-year career in service to the financial industry. Responsibilities included banking institution SVP/EVP/COO/CFO, Director of IT for $1 billion+ bank and a Manager of Risk and Performance Services for one of the largest CPA and consulting firms in the US. Ron has held numerous certifications with respect to information system security and risk management including CISA, CISM, CISSP and CGEIT. Ron’s extensive experience with business operations, risk assessment, internal control quality, technology systems and security are invaluable across the firm’s line of service offerings. Ron is a Florida licensed Private Investigator. Ron’s skills using the Internet as an investigative tool are fundamental to every engagement the firm undertakes. Ron is the owner/manager of Yellowjacket Investigations, a Florida licensed private investigation agency under which our collaboration operates.



The McMahon Clan in NY !!
Rory with his brothers (including prominent Criminal Defense Atty Gerald in the Center) and his two sisters.


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