  Semiconducting transition metal dichalcogenides (TMDCs) are very promising
materials for quantum dots and spin-qubit implementation. Reliable operation of
spin qubits requires the knowledge of Land\'e g-factor, which can be measured
by exploiting the discrete energy spectrum on a quantum dot. However, the
quantum dots realized in TMDCs has yet to reach the required quality for
reliable measurement of g-factor. Quantum dot sizes reported in TMDCs so far
are not small enough to observe discrete energy levels on them. Here, we report
on electron transport through discrete energy levels of quantum dot in a single
layer MoS2. The quantum dot energy levels are separated by few (5-6) meV such
that the ground state and the excited state transitions are clearly visible.
This well resolved energy separation allows us to accurately measure the ground
state g-factor of ~5 in MoS2 quantum dots. We observe a spin filling sequence
in our quantum dot under perpendicular magnetic field. Such a system offers an
excellent testbed to measure the key parameters for evaluation and
implementation of spin-valley qubits in TMDCs, thus accelerating the
development of quantum systems in two dimensional semiconducting TMDCs.
