String Theory has been proven to be an important guide in constructing (semi-)realistc supersymmetric models of particle physics. While most recognise the results from Heterotic String theories, strongly coupled and non-perturbative (more general) formulations, such as F and M theories, have recently provided an exciting new branch of String Phenomenology. In this communication we will show how M Theory compactified on G2 manifolds provide all the ingredients for model building and a yet-much-unexplored territory. In doing so we will present the so-called G2-MSSM, an SU(5) class of models with the MSSM spectrum, before presenting the most recent developments on SO(10) SUSY GUTs arising from M Theory on G2 manifolds. We will show that SO(10) SUSY GUTs from M Theory imperatively require a TeV scale extra vector-like family and light gauginos, both providing a striking smoking gun at reach of the LHC.