  We calculate the weak scale MSSM spectrum starting from a heterotic string
theory compactified on an anisotropic orbifold. Supersymmetry breaking is
mediated by vector-like exotics that arise naturally in heterotic string
theories. The messengers that mediate SUSY breaking come in incomplete GUT
multiplets and give rise to non-universal gaugino masses at the GUT scale.
Models with non-universal gaugino masses at the GUT scale have the attractive
feature of allowing for precision gauge coupling unification at the GUT scale
with negligible contributions from threshold corrections near the unification
scale. The unique features of the MSSM spectrum are light gluinos and also
large mass differences between the lightest and the next-to-lightest
neutralinos and charginos which could lead to interesting signatures at the
colliders.

High Energy Physics - Phenomenology;High Energy Physics - Theory