A cable management arm assembly for holding cables for an equipment rack having a first chassis slot and a second chassis slot, the first chassis slot and the second chassis slot arranged vertically between two side rails (102, 104), the cable management arm assembly comprising: two mounting tabs (302, 304) having a vertical slot attached to the rails (102, 104); two mounting brackets (132, 134) attached to the two mounting tabs (302, 304); a bottom support bracket coupled to the mounting brackets (132, 134), the bottom support bracket being substantially perpendicular to the side rails (102, 104); the mounting brackets (132, 134) operable to be positioned between two vertical positions on the mounting tabs (302, 304) relative to the first chassis slot and the second chassis slot; a slide bracket attached to one of the mounting tabs (302, 304); a cable management arm attached to the slide bracket; and a slide bracket operable to be positioned between the two vertical positions on the mounting tab (302, 304) relative to the first chassis slot and the second chassis slot; wherein the slide bracket is capable of being adjusted relative to one of the side rails (102, 104), wherein the equipment rack comprises a locking mechanism (322, 324, 326) on the cable management arm assembly, the locking mechanism (322, 324, 326) being disposed between the bottom support bracket and one of the first chassis slot and the second chassis slot locking the cable management arm assembly to the mounting tabs (302, 304) to fix the cable management arm assembly in either of the two vertical positions, and actuating the locking mechanism to a release position allows the slide bracket and the mounting bracket (132, 134) to be articulated linearly allowing vertical movement of the cable management arm assembly. two mounting tabs (302, 304) having a vertical slot attached to the rails (102, 104); two mounting brackets (132, 134) attached to the two mounting tabs (302, 304); a bottom support bracket coupled to the mounting brackets (132, 134), the bottom support bracket being substantially perpendicular to the side rails (102, 104); the mounting brackets (132, 134) operable to be positioned between two vertical positions on the mounting tabs (302, 304) relative to the first chassis slot and the second chassis slot; a slide bracket attached to one of the mounting tabs (302, 304); a cable management arm attached to the slide bracket; and a slide bracket operable to be positioned between the two vertical positions on the mounting tab (302, 304) relative to the first chassis slot and the second chassis slot; wherein the slide bracket is capable of being adjusted relative to one of the side rails (102, 104), wherein the equipment rack comprises a locking mechanism (322, 324, 326) on the cable management arm assembly, the locking mechanism (322, 324, 326) being disposed between the bottom support bracket and one of the first chassis slot and the second chassis slot locking the cable management arm assembly to the mounting tabs (302, 304) to fix the cable management arm assembly in either of the two vertical positions, and actuating the locking mechanism to a release position allows the slide bracket and the mounting bracket (132, 134) to be articulated linearly allowing vertical movement of the cable management arm assembly.