Firstly, good that you are managing both work and study.
Here, p[lease note that, do not get swayed with the work environment, because [for any higher studies, whether MBA or any certificate or a Post graduate degree], you will need a minimum of 60% or a first class.
So do work but at the same time, see that studies are not affected.
As rightly said by the previous counselors, to pursue a Part-time MBA, you need a minimum of 3 years work experience, which you already have, but you need a masters degree too.
As far as choosing a specialization is concerned, since you have menti