The ACARI Roof Top Mounting (RTM) Platform allows various devices to be installed on a vehicle that would otherwise be attached directly through the top of the truck cab. The ACARI patent pending design reaches inside the cab roof through the Center High Brake Light opening and clamps tight to form a rigid, rugged platform without drilling holes or marring the vehicle finish. The ACARI RTM gasketing system forms a perimeter seal allowing all wiring to run into the vehicle in an enclosed environment. The ACARI RTM platform is manufactured from 6063 aluminum alloy with a durable clear anodized finish (non-magnetic), high impact ABS polymer endcaps and T25 tamper resistant fasteners. The RTM platform is available in lin 22", 28", and 34" lengths.