giving a detail of- giving details of
are attached for your consideration- this seems unnecessary as you have already said 'enclosed'
I utterly believe- I would delete 'utterly'- let them make that sort of decision.
skill as detail- skills detailed
working with person- people (or- in a team???)
career goal- goals meet your requirements
At your convenience,- delete the first and leave the second
Thank you for your time and consideration.- Thanking you in advance for yout time and consideration, I lo9ok forward to hearing from you