Driven by the increased demand for versatile electronics with improved functionality, high performance, light weight, low cost and improved design options, conductive filler/polymer composites (CPCs) have emerged as a distinctive solution. Manipulating the conductive network formation in CPCs allows them to be employed in a wide range of applications, such as charge storage, electrostatic discharge dissipation and electromagnetic interference (EMI) shielding. In this work, controlling the conductive network formation was the key aspect in designing the morphology of CPCs for electrical applications. Carbon nanotube (MWCNT) was chosen as conductive filler due to its surprising electronic structure and growing industrial usage. We employed two distinct techniques to improve or deteriorate conductive network formation to improve the electrical properties in CNT/polyimide composites, i.e. electrical conductivity, EMI shielding and dielectric properties. Prior to exploring the influence of the above-mentioned techniques on the electrical properties of CPCs, a series of studies were implemented on MWCNT/polyimide composites to obtain a general understanding from the electrical behaviors of CPCs as a function of MWCNT content. The results over the X-band showed that the electrical conductivity, EMI shielding and dielectric properties rose with CNT content.