As an AD & coach? Absolutely! Both coached under McDaniels and are very familiar with each other.
Not even sure if Reardon is open to the idea of being an AD (I'd like to think that money would talk though), but Warren would absolutely love for these two to be working side by side again.
Fair enough. Comes down to egos I suppose. I remember when McDaniels came to Massillon as an AC he did not mesh well with the HC due to differences in opinion on strategy and personnel. AD and coach is a bit different but I look at both as coaches.