In this experimental study, a highly efficient NS-RGO–Cu-MOF electrocatalyst was developed for electrochemical water splitting, encompassing both the Hydrogen Evolution Reaction (HER) and Oxygen Evolution Reaction (OER). First, nitrogen- and sulfur-doped reduced graphene oxide (NS-RGO) was synthesized by fabricating GO via Hummer’s method, followed by a condensation technique at 190°C. Next, a copper-centered metal-organic framework (Cu-MOF) electrocatalyst was produced using a solvothermal approach. Finally, the Cu-MOF was loaded onto the NS-RGO substrate at a specified weight percentage via pyrolysis at 750°C under nitrogen flow. The synthesized composite was characterized using six analytical techniques, confirming its desirable morphology. The electrochemical water-splitting performance was evaluated using a three-electrode configuration under standard conditions, yielding onset potential values of 0.65 V vs. Ag/AgCl and -0.98 V vs. Ag/AgCl for OER and HER, respectively. Due to the synergistic effects between the NS-RGO substrate and the Cu-MOF composite, the electrocatalyst exhibited significantly enhanced electrical conductivity, stability, and catalytic activity, showing promise as an alternative to Pt-based electrocatalysts for electrochemical water-splitting applications.