
Will M. answered 05/23/19
Experienced 99th Percentile GMAT Tutor
Yes, plenty of people have cracked the GMAT with a 750+ score while working. Those people share common traits:
1 - Determination: a willingness to put in the time and energy before/after work to study and review.
2 - Willingness to Learn from Mistakes: the GMAT is a tough exam. In order to make significant gains and achieve a 750+ score, you must relentlessly examine the "why" behind your missed problems. Are you not understanding the content conceptually? Are you having difficulty interpreting the question? Are you making numerous unforced errors? A constant and relentless focus on the "why" is essential for minimizing future errors.
3 - Willingness to Get Help: preparing for the GMAT can seem long, onerous and lonely. The best test takers who juggle work with studying understand that time is precious. Most seek help early on in order to minimize wasted time and gain insight from experienced test takers/tutors who have walked the path before them.
I hope this helps!