  In the inverse see-saw model the effective neutrino Yukawa couplings can be
sizable due to a large mixing angle between the light $(\nu)$and heavy
neutrinos $(N)$. When the right handed neutrino $(N)$ can be lighter than the
Standard Model (SM) Higgs boson $(h)$. It can be produced via the on-shell
decay of the Higgs, $h\to N\nu$ at a significant branching fraction at the LHC.
In such a process $N$ mass can be reconstructed in its dominant $N\rightarrow W
\ell$ decays. We perform an analysis on this channel and its relevant
backgrounds, among which the $W+$jets background is the largest. Considering
the existing mixing constraints from the Higgs and electroweak precision data,
the best sensitivity of the heavy neutrino search is achieved for benchmark $N$
mass at 100 and 110 GeV for upcoming high luminosity LHC runs.
