  In an attempt to unfold (if any) a possible connection between two apparently
uncorrelated sectors, namely neutrino and dark matter, we consider the type-I
seesaw and a fermion singlet dark matter to start with. Our construction
suggests that there exists a scalar field mediator between these two sectors
whose vacuum expectation value not only generates the mass of the dark matter,
but also takes part in the neutrino mass generation. While the choice of $Z_4$
symmetry allows us to establish the framework, the vacuum expectation value of
the mediator field breaks $Z_4$ to a remnant $Z_2$, that is responsible to keep
dark matter stable. Therefore, the observed light neutrino masses and relic
abundance constraint on the dark matter, allows us to predict the heavy seesaw
scale as illustrated in this paper.The methodology to connect dark matter and
neutrino sector, as introduced here, is a generic one and can be applied to
other possible neutrino mass generation mechanism and different dark matter
candidate(s).
