Professional Technical Surveillance Services – UK Wide
Discreet, lawful, and expert covert surveillance operations, training and equipment — trusted by corporate, government and private clients.
SIASS (Specialist Intelligence & Surveillance Services) is a UK-based provider of technical surveillance and covert investigation support
Based in Newcastle-upon-Tyne, we provide our services throughout the UK.
SIASS provides independent investigation, surveillance and professional witness services to organisations that need evidence before they can act.
Who We Work With
We support organisations across the UK, including:
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Government departments
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Corporate security teams
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HR teams
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Legal and investigative professionals
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Insurance investigators
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Private investigation firms
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Safeguarding organisations
We deliver practical, operationally focused services in the following areas:
Technical Surveillance (Covert Operations)
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Lawful covert surveillance support for investigations
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Evidence gathering in line with UK legislation
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Support for regulatory and enforcement teams
Surveillance Equipment & Advice
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Guidance on appropriate and lawful use of equipment
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Honest, vendor-neutral advice (including when NOT to buy equipment)
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Support in procurement decisions
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Training for investigators and enforcement teams
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Awareness sessions on hidden cameras, tracking devices, and technical threats
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Practical, real-world guidance based on operational experience
Our work often involves sensitive environments where privacy, compliance, and evidential integrity are critical. We challenge misleading claims and promote informed, responsible procurement of lawful, ethical surveillance services.
Insights & Guidance 👉 Visit our blog to learn more.
We regularly publish insights on:
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Managing covert investigations
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Legal issues, ethics and risk assessments
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Hidden cameras and voyeurism
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Technical surveillance risks
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Procurement considerations
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Emerging threats (e.g. Bluetooth tracking)
If you need support, advice, or simply want to understand more about how our services could be useful for you, we provide clear, practical guidance without unnecessary complexity or cost.
Important Note
If you are asking these questions;
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How do I get evidence?
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How do I get proof?
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How do I know what's happening?
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How do I get a witness?
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How do I get independent evidence?
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How do I stop this problem?
You are in the right place!
Many organisations face situations where they suspect a problem exists but lack the evidence required to take action.
Without evidence, enforcement becomes difficult, disciplinary action becomes risky, and decision-making becomes uncertain.
Who We Help
We provide trusted operational support to local authorities, housing associations, government departments, commercial organisations, private investigators and private individuals in identifying, managing, and mitigating surveillance-related investigations and risks.
VETERAN OPERATED
The unit was formed by ex-British army personnel in 2000 to provide professional services to clients world-wide.
SIASS continues to be Veteran operated, so you can be assured of the highest service level available.
For further information about what we do and how we do it take a look at our blog pages.