National Surveillance and Intelligence (NSI) is an Australian owned Technical Surveillance Counter Measures (TSCM) Firm based in Sydney. We offer world class counter espionage solutions in Australia as well as internationally, specifically the South East Asian region. Our specialties include electronic bug sweeps and detection of listening devices; counter espionage consulting; mobile phone forensics, recovery of deleted data such as deleted SMS recovery; and espionage risk assessment and management.

NSI also provides Live TSCM Monitoring (on or off site); analogue and digital phone system analysis, network and VoIP system analysis and sweeps; encrypted communications (Voice and SMS); Strategic Global Intelligence (country specific intelligence briefings, travel advisory reports); and a corporate investigation service that combines with our TSCM service to investigate any suspected persons. These services are available to businesses, corporations, government, high net-worth individuals and private individuals.