BJT-piloted MOSFET circuit: Feedback requested
There are hundreds of switch designs on this site.  You must define I surge ,, Power dissipation in switch and turn on, off times.

But presently the transistor will needs base current limiting and a base shunt prevent floating when off with stray noise turning it on.  Values are not critical.  (and I see this part already includes them 4k7,10k)



Also there is no short circuit protection and the Tact Stop switch does not latch.

There may also be a need to prevent Vgs being exceed by ESD damage from a floating output and connecting long charged floating wires.