Could you please comment grammatical mistakes

24 February 2021,

To whom it may concern,

Re: Rita Ngan

I have known Rita in my capacity as the Manager of the QS team at ABC Engineering Limited since December 2017.

Rita has good written and verbal communication skills in the workplace. She has diligently performed her daily task assignments, and able to meet critical deadline. She has been a positive member of the QS team.

I am very grateful for her contributions to our office and very confident that she has good sense of responsibility to add value wherever she works.

Yours faithfully,

Annie Smith BSc AHKIS MRICS