history: I was very positively suprissed by the work done by a coworker. Hi_comma_ yesterday_comma_ I was very positively suprissed by the work done by a coworker. Thats good news! What did they do to surprise you? 
current: He is realised a full project on his own and have used all IT best pratices for this project in very short period of time. He is very skilled.
next: Amazing, Im happy for you. :) 