Granite Island Group Telecommunications security, counterintelligence, and security consulting. Based in Massachusetts. http://www.tscm.com/

Communication Security Inc. Technical surveillance countermeasure services. Bay City, Texas. http://www.bugsweep.com/

The National Cybercrime Training Partnership Training law enforcement in electronic and high-technology crime. http://www.nctp.org/

Aegis Intelligence Security consultants specialising in technical surveillance countermeasures, information security and corporate investigations. Based in Scotland. http://www.aegis.sageweb.co.uk/

Technical Security Consultants Inc. Services in the areas of electronic countermeasures and protection of proprietary information, training and seminars. Carrollton, Georgia. http://www.dbugman.com/

International Procurement Services Ltd Electronic counter measures sweeps in the United Kingdom. http://www.securitysearch.co.uk

TSCM Technical Services Security consulting service dedicated to the detection of eavesdropping and electronic surveillance. http://www.tscmtech.com/

Executive World Services Assistance to business and government in the detection and nullification of electronic information theft and eavesdropping systems. Braselton, Georgia. http://executiveworldservices.com/

TSCM Debugging and eavesdropping detection training and services. Based in South Africa. http://www.tscm.co.za/

Hetra Secure Solutions Designs and manufactures low emission computer systems and peripherals secured to TEMPEST standards. Product specifications available in pdf format. http://www.hetrasecure.com/

Advanced Countermeasures Offers services in locating electronic eavesdropping devices through electronic detection and manual inspection. Serves the Midwestern US. http://counterspy.iwarp.com/

Computer Security Solutions, Inc. Offers computers, peripherals and PDAs secured to TEMPEST standards. Product specifications. Based in McLean, Virginia, USA. http://www.compsecinc.com/

Audiotel International Manufacturer of counter surveillance electronics including harmonic receivers, junction detectors, bug and mobile phone detectors and cable checkers. Located in Corby, United Kingdom. http://www.audiotel-int.com/

SST Limited Counter-surveillance sweep services. Also offer various electronic surveillance, counter-surveillance and protective equipment. Based in Purley, Surrey, United Kingdom. http://www.sstlimited.com/

EED Co, Inc Offer counter-surveillance sweep services. Tools used, credentials and contact details. Based in New York, USA. http://www.bugfinderusa.com/

Artemis Security Solutions Ltd Offer counter-surveillance sweep and inspection services. Details of services, equipment used and company background. Based in London, United Kingdom. http://www.artemis-tscm.com/

Research Electronics International Offer training in how to conduct counter-surveillance investigations. Also design and manufacture electronic countermeasure equipment. Based in Algood, Tennessee, USA. http://www.research-electronics.com/

International Protective Group Offer counter-surveillance sweep services and training. Information on approach and results of previous investigations. Mississauga, Ontario, Canada. http://www.ipg-protect.com/

Murray Associates Eavesdropping detection and counterespionage consulting services. Includes espionage newsletter archive and downloadable guidance on security and bug detection. Based in Oldwick, New Jersey, USA. http://www.spybusters.com/

The SANS Institute Offer computer security research, training and information. http://www.sans.org/