  We consider an extension of the Standard Model (SM) augmented by two neutral
singlet fermions per generation and a leptoquark. In order to generate the
light neutrino masses and mixing, we incorporate inverse seesaw mechanism. The
right handed neutrino production in this model is significantly larger than the
conventional inverse seesaw scenario. We analyze the different collider
signatures of this model and find that the final states associated with three
or more leptons, multi jet and at least one b-tagged and (or) $\tau$-tagged jet
can probe larger RH neutrino mass scale. We have also proposed a same-sign
dilepton signal region associated with multiple jets and missing energy that
can be used to distinguish the the present scenario from the usual inverse
seesaw extended SM.
