Nissan Repair: 1995 nissan altima wont start,just got new starter battery is fine, nissan altima, neutral safety switch

Question
My 1995 nissan altima will not start, I just put a new starter in, and my battery is fine, machanic did the work and she started fine when I picked her up but sitting at home over night now won't start.
What do you think we missed

Answer
Casey,

If the starter is new and you have a charged battery I would look at the safety interlock switch.  If you have an automatic the neutral safety switch could be bad and if it is a manual the clutch switch could be bad.  Wire around either to verify and replace if necessary.  Way too common a problem these days.  Remember that the car is over ten years old.