  We consider a fermionic dark matter (DM) in the left-right symmetric
framework by introducing a pair of vector-like (VL) doublets in the particle
spectrum. The stability of the DM is ensured through an unbroken
$\mathcal{Z}_2$ symmetry. We explore the parameter space of the model
compatible with the observed relic density and direct and indirect detection
cross sections. The presence of charged dark fermions opens up an interesting
possibility for the doubly charged Higgs signal at LHC and ILC. The signal for
the doubly charged scalar decaying into the dark sector is analyzed in
multilepton final states for a few representative parameter choices consistent
with DM observations.
