SIA Approved Contractor
Covert & Specialist
Security Services
Plain-clothes security experts for halls, arenas, exhibitions and busy centres. Our operatives blend into the crowd — stopping theft, disorder and safety risks before they become problems.
"Always Present. Never Obtrusive."
Why Marithon Security
Maximum security.
Zero disruption.
Covert Plain-Clothes Teams
Low-profile, fully licensed operatives. Deterrence without the intimidating uniform look that puts off guests.
SIA Compliant & Accredited
Every officer holds a valid SIA licence. We're approved under the SIA Approved Contractor Scheme — the gold standard in UK security.
Flexible & Reliable
From one-off events to long-term contracts. We work directly for venues or as trusted specialist partners for larger security providers.
Trusted Across The UK
Working with busy venues nationwide
Exhibition HallsConference CentresCivic & Community HallsSports ArenasShopping CentresEvents & Festivals
Get Started
Ready for security that works in the background?
Tell us about your venue or contract. We'll respond with a no-obligation quote and a clear plan for covering your site.