A modular conduit cable management assembly is used with tall vertical structures for holding and managing one or more cables, with the assembly having a plurality of conduit members and a plurality of removable closure members. Each conduit member has at least one retaining arm, a plurality of prongs, an anchor, and a core, with each conduit member defining a slot opening, a plurality of apertures, a holding cavity forming a conduit track, and a receiving chamber. Once assembled, one or more cables can be installed within the conduit track, with at least one of the closure members closing the conduit member slot opening. The cables and each conduit track may be accessed at a later time after removing the closure member.