…where to start.  Umm… it started like this, and just got more confusing:

My objective is Building a progressive career in business management, based on strong and well established academic and practical experience, and that’s why I am interested to join the staff, and I am sure that will has it’s great impact on my career, while I am gaining a new experience n business. 

Although now that I look at it, yes, will does have an impact on your career.  Using grammar and spelling properly help, as well.