Polymer nanocomposite (PNC) is a promising area for researchers as it offers superior properties and different capabilities to the overall material. In the case of Polymer nanocomposites, the reinforced nanofiller provides a reasonably high specific surface area, which results in a high surface-to-volume ratio and permits good interphase between polymer matrix and nanofiller with improved mechanical properties of the overall material. Both the organic and inorganic nano fillers have been reinforced in various polymers. The organic and inorganic nano fillers offer different range of mechanical properties to Polymer nanocomposite material. In order to achieve combine effect of both the nano fillers, one can use the combination of both i.e. reinforcing combinations of organic and inorganic nano fillers simultaneously as Hybrid nano filler. Another aspect of using Hybrid nanofiller is to achieve multifunctional characteristics with a robust mechanical interlock and bonding between the polymer matrix and hybrid nanofillers. With the use of hybrid nanofillers, even at the deficient percentage of loading of nanofillers, the desired multifunctional abilities of polymer nanocomposites may be achieved. In this work, it was planned to prepare and study a Hybrid Polymer nanocomposite (HPNC) material with overall improved multifunctional and advanced mechanical properties. This study uses poly-aryl-ether-ketone (PEK) as a polymer matrix. The different nanofillers like carbon nanotubes (CNTS), Graphene oxide (GO), and Molybdenum di-sulfide (MoS2) with hybrid nanofiller have been selected to use as a nanofiller material to achieve improvement in the desired mechanical properties of PEK based PNC and HPNC. The melt mixing method was used to prepare samples. The extruder with twin screws, followed by an injection moulding machine, was used to achieve homogenous nanofiller dispersion in the polymer matrix. The tensile testing and impact testing was done to study and understand the mechanical behaviour and properties of HPNC and PNC. Scanning electron microscopy (SEM) was also done to study and observe the dispersion of the nanofillers in the polymer matrix. It was observed that in the case of HPNC, the mechanical interlock and bonding of the nanofillers with the polymer matrix were improved. It was also observed that there is improvement in tensile properties and flexural properties of HPNC material over virgin polymer and PNCs. Hence, the PNC and HPNC were prepared and tasted for multifunctional purposes.