N- and P-channel MOSFETs in series
If you want Q2 to be conducting when IC_P1 is high, you need to wire the output of OK1 to pull Q2's gate to ground, not high as you have it now. N-channel MOSFETs turn on when VGS is positive; P-channel MOSFETs turn on when VGS is negative.

Otherwise, your schematic looks fine. But as others have already pointed out, the fact that the two elements share ground should not be an issue in the first place. You could eliminate Q1 altogether.