  We discuss some phenomenological aspects of an $E_6$ inspired supersymmetric
standard model with an extra $U(1)_{N}$ gauge symmetry under which right-handed
neutrinos have zero charge, allowing a conventional see-saw mechanism. The
$\mu$ problem is solved in a similar way to the NMSSM, but without the
accompanying problems of singlet tadpoles or domain walls. The above
exceptional supersymmetric standard model (ESSM) involves the low energy matter
content of three 27 representations of $E_6$, which is broken at the GUT scale,
and allows gauge coupling unification due to an additional pair of Higgs-like
doublets. The ESSM predicts a $Z'$ boson and exotic quarks which, if light
enough, will provide spectacular new physics signals at the LHC. We study the
LHC phenomenology of the $Z'$ and extra quarks, including their production and
decay signatures particular to the ESSM. We also discuss the two-loop upper
bound on the mass of the lightest CP-even Higgs boson, and show that it can be
significantly heavier than in either the MSSM or the NMSSM.
