  Recently type II seesaw dominance in a supersymmetric SO(10) framework has
been found useful in explaining large solar and atmospheric mixing angles as
well as larger values of $theta_{13}$ while unifying quark and lepton masses.
An important question in these models is whether there exists consistency
between coupling unification and type II seesaw dominance. Scenarios where this
consistency can be demonstrated have been given in a SUSY framework. In this
paper we give examples where type II dominance occurs in SO(10) models without
supersymmetry but with additional TeV scale particles and also in models with
split-supersummetry. Grand unification is realized in a two-step process via
breaking of SO(10) to SU(5) and then to a TeV scale standard model supplemented
by extra fields and an SU(5) Higgs multiplet ${15}_H$ at a scale about
$10^{12}$ GeV to give type-II seesaw. The predictions for proton lifetime in
these models are in the range $\tau_p^0 = 2\times 10^{35}$ yrs. to $\tau_p^0 =
6\times 10^{35}$ yrs.. A number of recent numerical fits to GUT-scale fermion
masses can be accommodated within this model.
