  Coherent control of reactive atomic and molecular collision processes remains
elusive experimentally due to quantum interference-based requirements. Here,
with insights from symmetry conditions, a viable method for controlling Penning
and Associative ionization in atomic collisions is proposed. Computational
applications to He$^*({}^3\text{S})$-Li(${^2\text{S}}$) and
Ne$^*{}(^3\text{P}_2$)-Ar($^1\text{S}_0$) show extensive control over the
ionization processes under experimentally feasible conditions.
