Abstract: An apparatus for organizing and storing tools, related work materials, and convenience items such as a music system with speakers, a radio, a digital CD-player, and a MP3 adapter, as well as a compact refrigerator and a water cooler in a tool cabinet that is modular and easily transportable between work sites. The portable modular tool cabinet provides an electrical power system, shelving units and sliding drawers for holding tools and two lockable doors that hold additional hand tools and can be secured when the user is ready to transport the portable modular tool cabinet to another work site. The entire unit is transportable by using two base wheels and a pivotable-dolly-system with telescoping rod and wheel combinations that allow easy rolling to a transport vehicle such as a pickup truck for loading and transporting to another location.