  Helicity amplitudes are the fundamental ingredients of many QCD calculations
for multi-leg processes. We describe how these can seamlessly be combined with
resummation in Soft-Collinear Effective Theory (SCET), by constructing a
helicity operator basis for which the Wilson coefficients are directly given in
terms of color-ordered helicity amplitudes. This basis is crossing symmetric
and has simple transformation properties under discrete symmetries.
