  By extending the Standard Model with singlet-doublet fermions and triplet
scalars, all odd under a new $Z_2$ symmetry, we introduce a radiative seesaw
model that can simultaneously account for dark matter, explain the existence of
neutrino masses and allow for gauge coupling unification. We explore the viable
parameter space of the model after imposing collider, Higgs mass, dark matter,
neutrino mass and lepton flavour violation constraints. We find that dark
matter in this model is fermionic for masses below about 1 TeV and scalar above
and observe a high degree of complementarity between direct detection and
lepton flavour violation experiments, which should soon allow to fully probe
the fermionic dark matter sector and at least partially the scalar dark matter
sector.
