大家帮我看看,我这段英语有没有什么大的毛病,

大家帮我看看,我这段英语有没有什么大的毛病,
After graduation,the first year I did office secretarial work in medincine industry,the second year was promoted to administrative assistant.
My contents of the work:
1.My responsibility was to manage the company's main important files and documents .
2.I was in charge of the reception of the visiting guest
3.I wrote a number of announcements and the company rules.
4.I assisted the Chief Executive Officer for the company's daily arrangements
5.I managed the company's daily office supplies.
My skills:I am good at Word 、Excel and Powerpoint office software operations.I can use simply Photoshop's operation,and scan documents and photos.During the working time,I received a good reputation from leadership and colleagues because of my patience、hardworking and responsibility.I am also very easy going with others ,I often exchange new ideas with my leadership,and the company leadership affirmed me.