The realization of a molecular metal based on the crystallization of single-component, neutral molecules is a long standing quest. We report direct experimental evidence for the Fermi surface in [Ni(tmdt)₂], by detecting the quantum oscillations in magnetization. Torque magnetometry measurements of single crystals of [Ni(tmdt)₂], using a sensitive microcantilever at low temperatures in high magnetic fields to 45 T revealed dHvA oscillatory signals, for all directions of magnetic field, indicating the presence of electron and hole Fermi surfaces. These findings are consistent with band structure calculations, leaving no doubt that [Ni(tmdt)₂] is a single-component molecular metal in the most rigorous sense.