We offer advanced technical surveillance detection and countermeasure services to identify and mitigate unauthorized monitoring or tracking.
Klein Investigations provides professional-grade technical surveillance countermeasures (TSCM) for clients concerned about privacy, security, or unauthorized surveillance. These services are conducted using specialized training and equipment designed for residential, commercial, and vehicle environments.
Our counter-surveillance work is commonly requested in legal disputes, high-net-worth situations, corporate matters, and politically sensitive environments where advanced discretion is required.
Technical surveillance services include:
• Bug and device sweeps
• Political event sweeps
• GPS and auto-tracker detection
• Residential, office, and vehicle sweeps
• Counter-surveillance assessments
• Technical countermeasure recommendations
These services are performed discreetly and documented clearly for client awareness and decision-making.
Lead Investigators in Charge

CEO, Emeritus
Philip R. Klein, TPLI-PPO
Philip Klein is a nationally recognized investigator and personal protection officer with more than 40 years of experience. He founded Klein Investigations in 1992 and has worked extensively with government agencies, law firms, and major insurance companies on complex investigations throughout the United States.

Co-President, Operations
Charles “Charley” Klein, TPLI-PPO
Charley Klein is a senior investigator and operations leader at Klein Investigations with more than 15 years of experience in field investigations, personal protection, and operational oversight. He oversees investigative field operations and equipment management and is relied upon for complex, time-sensitive assignments nationwide.

California Operations
Gil Martinez, Investigator-PPO
Gil Martinez is a seasoned investigator and personal protection officer with extensive law enforcement and field operations experience. A former Los Angeles County Sheriff’s Deputy, he supports Klein Investigations and Texas Professional Bodyguards with investigative and protection operations across California and nationwide.

TPB President-PPO Team Leader-Instructor
Richard Quiroga, TPLI, PPO
Richard Quiroga is a highly respected personal protection officer and instructor with extensive law enforcement and tactical leadership experience. As President of Texas Professional Bodyguards, LLC, he provides close personal protection services and leadership for high-risk assignments across the United States.
FAQs
What is technical surveillance countermeasures (TSCM)?
TSCM involves the detection and mitigation of unauthorized monitoring devices such as bugs, trackers, or other surveillance equipment.
When should someone request a sweep or counter-surveillance service?
These services are often requested in legal disputes, high-risk situations, corporate matters, or when there is concern about privacy or unauthorized tracking.
Are these services performed discreetly?
Yes. All technical surveillance and countermeasure services are conducted discreetly and professionally, with clear documentation provided to the client.
Talk to Our Investigators
Reach out to discuss your situation and learn how our team can assist. All inquiries are handled discreetly and professionally.
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