  Flavor violating processes in the quark and lepton sectors are investigated
within a realistic supersymmetric $SO(10)\times A_4$ grand unification model.
By employing exotic heavy fermion fields, this model successfully describes
various features of the fermion masses and mixings including large neutrino
mixings accompanied by small quark mixings. In this model the flavor violation
is induced at GUT scale, at which $A_4$ flavor symmetry is broken, as a
consequence of the large mixings of the light fermion fields with these exotic
heavy fields. The stringent experimental constraint from $\mu\rightarrow
e\gamma$ decay rate necessitates a high degree of degeneracy of the
supersymmetry breaking soft scalar masses of the exotic heavy fields and
supersymmetric scalar partners of the light fermion fields. The choice of
slepton masses of order 1 TeV is found to be consistent with the constraints
from branching ratio of $\mu\rightarrow e\gamma$ and with all other flavor
changing neutral current processes being sufficiently suppressed.
