Protect confidential conversations, commercially sensitive information and executive privacy with specialist Technical Surveillance Counter-Measures (TSCM). TecMasters provides discreet electronic bug sweeping services for law firms, financial institutions, corporate organisations and private clients throughout London and across the UK.
For over 25 years TecMasters has delivered professional TSCM inspections for organisations where confidentiality cannot be compromised. Our experience includes assignments for international law firms, financial institutions, government departments, corporate organisations and high-net-worth individuals. Every inspection is undertaken discreetly using professional-grade detection equipment, structured search methodologies and comprehensive reporting.
Over 25 Years' Experience
London Based Specialists
Corporate & Legal Sector Experience
UK & International Coverage
Strictly Confidential Reporting and Recommendations

We deliver specialist Technical Surveillance Counter-Measures services to identify and mitigate electronic eavesdropping threats. Our work includes discreet bug sweeps for offices, private residences, and vehicles, using advanced detection equipment and proven methodologies. Every service is tailored to the specific risk profile of the environment, carried out with absolute confidentiality, and designed to provide clear, reliable assurance.

Every sweep is conducted using structured methodologies, ongoing research, and professional-grade detection equipment.
Trusted & Confidential
We operate with absolute discretion and confidentiality, ensuring your privacy and sensitive information are protected at every stage.
Specialist Experience
Our team focuses exclusively on TSCM and counter-surveillance, bringing deep technical expertise and real-world experience to every inspection.
Proven Methodology
Each sweep follows a structured, intelligence-led process designed to identify both active and dormant surveillance threats with accuracy.

Advanced Research & Technology
We continually research emerging surveillance techniques and invest in professional-grade detection equipment to stay ahead of evolving threats.
Clear Findings & Honest Advice
e provide straightforward results and practical guidance, so you understand exactly what was found and what actions, if any, are required.
Ongoing Client Support
Our support doesn’t end after the sweep — we remain available to advise on risk reduction, future inspections, and ongoing security concerns.
Trusted by organisations, professionals, and private clients for confidential TSCM services.
TecMasters conducted a comprehensive sweep of our offices with minimal disruption to our operations. Their approach was professional, methodical, and discreet throughout. The findings were clearly explained and gave our leadership team complete confidence moving forward.
The vehicle inspection was handled with a high level of expertise and discretion. TecMasters explained what they were looking for and why, which gave me complete confidence in the results.
The team were extremely professional and discreet during the inspection of my property. They took the time to answer questions and explain the process in detail. I felt fully informed and reassured throughout.
We required a trusted TSCM provider for a sensitive corporate matter. TecMasters demonstrated a high level of technical knowledge and professionalism from the initial consultation through to completion. Their service was precise, confidential, and reassuring.
I contacted TecMasters for a residential sweep and was impressed by how thorough and respectful they were of my home. Everything was explained clearly and calmly, which immediately put me at ease. The service provided real peace of mind.
TecMasters carried out a detailed sweep of my vehicle using advanced equipment. The inspection was completed efficiently and professionally, with clear feedback provided afterwards. I would not hesitate to use their services again.
There are several reasons why organisations request a Technical Surveillance Counter-Measures (TSCM) inspection. Common triggers include confidential commercial negotiations, concerns about information leaks, changes in key personnel, high-profile litigation, mergers and acquisitions, or simply as part of a proactive security strategy. Many clients also arrange regular inspections to provide assurance that sensitive discussions remain private.
Every inspection begins with a confidential consultation to understand your concerns and the areas requiring examination. Our specialists then conduct a systematic physical inspection of offices, meeting rooms, boardrooms and surrounding infrastructure before carrying out detailed electronic detection using professional TSCM equipment. Following the inspection, you will receive a confidential report outlining the work completed, any findings and practical security recommendations.
Yes. Professional TSCM equipment can detect many forms of electronic surveillance, including covert transmitters, hidden microphones, wireless cameras, GSM devices and other forms of electronic eavesdropping. However, effective bug sweeping combines advanced equipment with extensive experience, structured search procedures and detailed physical inspections. Technology alone is only one part of a successful TSCM inspection.
The duration depends on the size and complexity of the premises. A small office may be completed within a few hours, while larger corporate offices occupying multiple floors may require several days. Following an initial discussion, we will provide an estimated inspection schedule tailored to your premises and operational requirements.
Yes. Although we are based in London, TecMasters provides TSCM and bug sweeping services throughout the UK. We also support clients internationally where required, particularly organisations with multiple office locations or overseas operational requirements.
The cost of a professional TSCM inspection depends on several factors, including the size of the premises, the number of rooms to be inspected, the complexity of the environment and the level of risk involved. Following a confidential discussion, we will provide a clear, fixed quotation with no hidden costs. Every inspection is tailored to the client's requirements to ensure comprehensive coverage and value.
Whether you require a proactive TSCM inspection, have concerns about unauthorised surveillance or are preparing for a sensitive meeting, our specialists can provide confidential advice and professional support.

Get expert advice and discreet counter-surveillance services tailored to your environment.

Tecmasters provides professional Technical Surveillance Counter Measures (TSCM), bug sweeping and security services for commercial and private clients. Based in London and operating across the UK, we deliver discreet, reliable solutions designed to protect privacy and sensitive information.
Email: [email protected]
Phone: 07414 288814
monday: 8am - 5pm
tuesday: 8am - 5pm
wednesday: 8am - 5pm
thursday: 8am - 5pm
friday: 8am - 5pm
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