Professional Licensed Private Investigators


International Specialized Investigations is a licensed private investigations agency in Houston, Texas. We also have a field office in Mexico. 

Our Licensed Private Investigators offer private investigations services throughout Texas and Mexico. It is extremely important to make sure you hire a Licensed Private Investigator to conduct your private investigation. International Specialized Investigations is a licensed private investigations company in Texas.

Our Director of Investigations involves himself in each investigation. No client is ever just another number. We even urge you to call other investigations companies and compare your experience to speaking with them and private investigators. You will see we are results oriented driven.


Domestic investigations are primarily concerned with investigating matters that involve individuals and their personal issues. Our Licensed Private Investigators excel in domestic investigations.


International Specialized Investigations provides corporate investigations to assist with a wide range of investigative needs. It takes a professional Licensed Private Investigator to get the results you need.


Our Licensed Private Investigators work with law firms of all sizes and assist attorneys with a variety of investigative strategies to improve their civil, criminal and family law cases.


Private Investigations in Mexico are extremely different than investigations in the U.S.A.. Our Private Investigators in Mexico have the experience, skills and contacts to provide the results you need in Mexico.


Our Private Investigators can provide you with detailed background check information on any individual in the United States or Mexico to help make informed personal or business decisions.


We offer GPS tracking services and sales. Utilizing a GPS tracker can assist you with knowing the activity of employees or loved ones.

Private Investigator and Detective Service Areas

  • Houston, Texas
  • Pasadena, Texas
  • Galveston, Texas
  • Pearland, Texas
  • Friendswood, Texas
  • Clear Lake, Texas
  • Dickinson, Texas
  • Brownsville, Texas
  • San Antonio, Texas
  • Eagle Pass, Texas
  • Laredo, Texas
  • San Luis Potosi, S.L.P., Mexico
  • Monterrey, N.L., Mexico
  • Queretaro, Qro., Mexico
  • Acapulco, Gro., Mexico
  • Zacatecas, Zacatecas, Mexico
  • Aguascalientes, Ags., Mexico
  • Cancun, Quintana Roo, Mexico

Recent Private Investigator Cases

  • Surveillance-Houston, Texas
  • Surveillance-Orange, Texas
  • Animal Cruelty-Zacatecas, Mexico
  • Animal Cruelty, Aguascalientes, Mexico
  • Maritime Incident-Veracruz, Mexico
  • Maritime Incident-Campeche, Mexico
  • Witness Locate-Monterrey, Nuevo Leon, Mexico
  • Witness Locate-Lufkin, Texas
  • Matrimonial Investigation-Houston, Texas
  • Document Retrieval-Mexico City
  • Infidelity-League City, Texas
  • Surveillance-Laredo, Texas
  • Surveillance-San Luis Potosi

Ready to find out more?

Click on the button to find out more about our Private Investigator services in Texas and Mexico.

Surveillance in Texas and Mexico

Verify our license

International Specialized Investigations is insured and licensed by the Texas Department of Public Safety. All of our Private Investigators are registered with the Texas Department of Public Safety under our license. It is extremely important that your Private Investigator has the proper credentials to investigate in the State of Texas.