Need feeback/help with a cover letter

I need some feedback on (on or about?) the main paragraph of my cover letter. Grammar, spelling, word choice, unclear idea, or anything. I'm applying for a summer internship at Citigroup.

Having lived in two foreign countries in the past five years has taught me to not only be independent and responsible but also adapt to changes and circumstances. I believe this ability is crucial in the financial services industry because the business environment changes day by day (changes on a daily basis? which one is better?). From my last job as an IT student help desk leader, I got to practice my teamwork and leadership skills. I was responsible for maintaining over three hundred computers and training a team of five members. Beside school, I am committed to other activities on campus like honor society and student government. These activities give me experiences that are not taught in class and opportunities to make big changes to the university community. All the skills and experiences I've acquired make me a good fit for the position.

Any comments are appreciated.