HoustonDetective.com Logo
gray bar
For general information use the main tabs above. Fore more detailed information use the links below.

Legal and Insurance Investigations

Corporate Investigations

Personal Investigations

Licensed Private Investigator

HoustonDetective.com is the home of John McMahon and Associates, LLC. Owner and operator John McMahon is a native Texan, and has been a licensed Houston private investigator continuously since 1980. In 1994 he founded John McMahon & Associates, LLC. The company is a full service investigations company, and is fully licensed by the Texas Department of Public Safety, Private Investigator License Number A-07642.

As a Houston investigator with over 30 years experience, John has conducted literally thousands of investigations for Houston area corporate, insurance, legal and private sector clients. Whether you are an insurer, a small business, a large corporation, or a private individual, we offer a broad range of investigative services that can empower you to deal with a crisis efficiently and effectively. John McMahon & Associates will always handle your case professionally, ethically and tenaciously. All our private investigators are experienced, licensed and insured. We understand our client's need for privacy, and every discussion you have with us is held in strict confidence.

We specialize in surveillance, background investigations, due diligence, and defense investigations on high dollar indemnity insurance claims. We are committed to providing a high standard of excellence to each and every one of our clients, no matter how large or small their investigation.

John McMahon has been a Licensed Private Investigator in Houston, Texas continuously since 1980.

Houston DetectiveIn over a 30 years as a Houston investigator John McMahon has developed many unique sources and established valuable contacts. The company subscribes to over a dozen commercial databases to better serve our client's investigative needs. John McMahon's extensive skills as a mobile surveillance expert, public records analyst, and computer forensics expert, make him especially well suited to meet the demanding needs of a modern clientele. John deals with all his clients in a professional and compassionate, yet straight-forward manner. John McMahon is directly involved in every single investigation handled by his firm.

This site should answer many of your questions about our company and our investigative services. Thank you for your consideration, and please do not hesitate to call if you have any questions. If you need an honest competent Houston private investigator call us to discuss your specific needs. All consultations are free and completely confidential.
gray bar

Informative Articles

Locates & Skiptraces


Texas Association of Licensed Investigators Logo

Member of the Texas Association
of Licensed Investigators
Fraud Investigators Assoc of Texas Logo

Member of the Fraud Investigators Association of Texas
Certified Fraud Examiners Logo
Association of Certified Fraud Examiners, Associate Member

Texas Department of Public Safety - Private Security Bureau - Confirm Our License

credit cards image
Houston Private Investigator