It is going to be tough. It was discussed a bit here:
https://gmatclub.com/forum/working-whil ... 94156.htmlUltimately You are going to shoot yourself in the foot with either your Job or Your School.
Most programs tell you that you cannot work and go to school but they don't police it. That's just them setting their expectations. However, you are going to be very short on time while doing your MBA. If you would like to work while going to school, I would suggest PT MBA or EMBA. They are designed around working and going to school at the same time.
Otherwise, you have 2 things you are focusing on while at BSchool: 1. Studying and 2. Recruiting.
There are more things such as soul-searching, networking, experimenting, etc but the main 2 are attending classes and recruiting. You are going to sacrifice one of those (likely recruiting since that is the hardest and least regulated ones). I could only see this if you are not planning to change jobs/recruit until after your MBA and I would say recruiting after your MBA is going to be tricky as you will lose support and tools needed to do the recruiting and helping you succeed.