
I'm Jack Charman, founder and chief investigator of National Private Investigators (NPI). At NPI, we specialise in bug sweeping (TSCM), technical surveillance countermeasures, covert surveillance, background and trace investigations, and asset and fraud investigations. Our base is in London, but we serve clients across the UK.
My background includes military reconnaissance (Grenadier Guards), which taught me disciplined intelligence, covert methods and careful planning. Those skills now guide how we conduct investigations in civilian settings.
After years in military special reconnaissance, I saw that many private investigative firms lacked discipline, accountability or the technical capabilities often needed for serious investigations. In March 2016, I set out to build an agency that combines operational rigour, ethical standards, and discretion. NPI was born to be trustworthy, technically capable and client-focused.
I believed clients under stress (personal, corporate or legal) deserve clarity, proof and a pathway forward, not vague promises. That ethos still shapes how I structure cases and client reporting.
From day one I built NPI around both technical capability and field presence. I invested heavily in detection equipment, surveillance tools, and training, assembling a vetted network of operatives across the UK.
We emphasised membership in credible professional bodies (IPI, ABI, WAPI) as part of our credibility guarantee. We also published real case studies, client reviews, and transparent service descriptions (bug sweeps, surveillance, tracing) to reduce client uncertainty about what we actually do.
Overcoming "shady investigator" stereotypes: To address this, we emphasised transparency, clear legal boundaries, and strong client communication.
Staying ahead of technical escalation: Adversaries sometimes use advanced devices, so we continuously upgrade our TSCM capabilities to detect the latest surveillance tech.
Clients often say they hire us for clarity, decision-making confidence, and peace of mind. Our Trustpilot reviews average about 4.2/5 and include praise for professionalism and discretion.
If I were to relaunch NPI today, I would prioritise building more scalable digital intake systems earlier with secure client portals and encrypted communications to streamline onboarding. I'd also have documented more internal case metrics (like types of devices found and detection success rates) to sharpen marketing claims and operational insights sooner. Lastly, I'd expand team recruitment earlier to avoid bottlenecks in high demand periods.
I'm expanding our reach in corporate and cybersecurity intersections. More clients are concerned about internal digital espionage, mixed hardware/IT bugs, and hybrid threats. We're also improving our digital detection capability (IoT, network intrusion monitoring).
We plan to publish more client education content: how bug sweeps work, red flags to watch for, and prevention tips. This helps potential clients understand when and how to engage us. We aim to be not just an investigative service, but a trusted adviser on privacy, surveillance risk and investigative readiness.
If you have suspicions, personal or corporate, or want technical assurance, I'd welcome a confidential conversation.