  We use massive spinor helicity formalism to study scattering amplitudes in
$\mathcal{N}=2^*$ super-Yang-Mills theory in four dimensions. We compute the
amplitudes at an arbitrary point in the Coulomb branch of this theory. We
compute amplitudes using projection from $\mathcal{N}=4$ theory and write three
point amplitudes in a convenient form using special kinematics. We then compute
four point amplitudes by carrying out massive BCFW shifts of the amplitudes. We
find some of the shifted amplitudes have a pole at $z=\infty$. Taking the
residue at $z=\infty$ into account ensures little group covariance of the final
result.
