is located in Marin County, California. We provide confidential Technical Surveillance Countermeasures (TSCM) services, security consultation, and investigative services for clients located in Northern California. Many of our clients are located in Sonoma County’s “Telecom Valley” as well as Santa Clara County’s “Silicon Valley”. Walsh & Associates has provided technical intelligence and countermeasures services for government, corporate and private sector clients in many areas of the Western United States.


WALSH & ASSOCIATES is dedicated to the detection of eavesdropping devices and providing our clients with the most comprehensive counterespionage services available. We provide confidential and discrete technical surveillance countermeasures inspections. Our “sweep” procedures are based on the most recent information about espionage devices and techniques. Our TSCM inspections include tests for devices such as:

  • Covert radio transmitters
  • Carrier current transmitters
  • Telephone modifications
  • Infrared transmitters
  • Hidden microphones
  • Naturally occurring audio paths
  • Cell-phone Intercept spy-ware
  • Wi-fi and Bluetooth hacking

Security Services: Our consultants can assist you with security surveys, risk analysis, information/communication security, executive protection, and counter-surveillance services. Walsh & Associates can also provide corporate security training classes. Complimentary one hour seminars regarding TSCM and other security disciplines are available.