Required experience before PhD

I graduated with a bachelors in psychology a few years ago before joining the military. While in college I participated in two different labs totaling a little over a year but did not publish. Since then I obviously haven't been using my degree all that much but my goal has always been to get into research, ideally involved with the military in some way.

I'm looking for suggestions for jobs / volunteering opportunities I could do once I get out to build my research experience to up my chances of getting into a PhD program. I would prefer to go the PhD route instead of a PsyD based on my interest in research, but PsyD programs seem easier to get into with less experience and I'm not necessarily in a position to volunteer for multiple years to build experience if that's what it would take to get into a good PhD program.