What qualifies as professional experience when applying to Business School?

Every school has different criteria for what they consider to be qualify as professional experience so you should call and ask the admissions office of the school you are interested in to confirm but generally speaking, yes, part-time can fulfill this requirement. Whether it's full-time or part-time the requirement will depend on the type of responsibilities you had and the functions you performed. Were you responsible for other people? Did you participate on a lot of team projects? If so, what was your role on those projects? Were you the project leader? Secretary? Did you provide customer service in any of your jobs? If so, how? Face to face or over the phone?

Also, depending upon your concentration, the professional experience requirement may differ. For example, if your concentration will focus on business in Asia, what type of experience do you have working internationally? Do you speak foreign languages? If your concentration will be entrepreneurship, have you ever attempted to start your own business?  Have you ever worked at a start-up? If it will be accounting, have you ever prepared tax returns? If so, for who?

Business careers span a wide range of industries, including finance, marketing, entrepreneurship, and management. To be successful in any business sector, however, one must possess certain qualities that separate the best in the business from the mediocre. Some of the qualities top business leaders must have include the following:
1.Leadership Skills
To be successful in business, you need outstanding leadership skills. You should be able to command a room and inspire a team of associates to perform at their best.
2.Unafraid to Take Risks
A great business leader has an entrepreneurial spirit and is not afraid to take risks to advance the business and improve revenues.
3. Competitive Spirit
A sense of competition helps to propel the best business men and women to the forefront of the industry. The desire to do better than similar organizations can prove vital to your success.
4. A Good Intellect
Thorough knowledge of the business world, as well as of technology, economics, politics, history, and other matters, is important for business leaders. Intellect helps to cultivate a global perspective and sparks creativity.
5. Ability to Take the Initiative
Initiative is important in business as it continually pushes people to work harder, learn more, and perform better.
6.Solid Communication Skills
Great communication skills are essential, as no business transaction is a solitary endeavor. Business leaders must be able to communicate effectively in writing and orally to ensure the highest levels of efficiency.
7. Ambition
The most successful business leaders have unrelenting ambition. They have lofty goals and do whatever it takes (within legal limits, naturally) to achieve those goals.
8.A Reliable Nature
Great business men and women are unfailingly reliable. They can be counted on to get the job done and always make a positive contribution.
9.Personal and Professional Integrity
A keen sense of integrity is important to ensure that business transactions are conducted with ethics in mind. A successful business person conducts him or herself in a respectable manner and always acts fairly and responsibly.
10.Likeability
Great business leaders have great personalities. Their colleagues, superiors, and subordinates respect them and enjoy working with, or for, them. They are able to make networking contacts and use them to help fuel the business along