He has performed quite well during two years work at his position.Now he has a very profound knowledge of his business,and has already made great contribution to the company. 刚开始以为楼主自己发表演讲呢,后来才看到是介绍别人,已经改过了
In the two years of working period,I have an excellent performance that my knowledge of business is deeply understand and I have made a great contribution for my company!