I've to write a self-assessment for my company. Please help and my check my grammar as follows:

This is very important to me. Please help!

"In these years working in the company, I've been working my best to achieve the goal of the company requested and I've been doing fine. I always have great confident in fulfiling my own business mission and the target that my boss expect. I trust this position would even give me better space and chance to do and complete my business vision of the company "

In my work, I have been doing my best to achieve the company goals requested of me, and I believe I have been successful. I have confidence in my ability to fulfil my own business mission and the targets that my supervisor assigns me. I hope my position will continue to allow me to expand my efforts and give me further chances to help complete the business vision of the company.
Thank you so much, Mister Micawber!