Need to correct the grammar in the following letter below.?

Question

Dear Ms Diana,
As I Indicated during the course of my interview, my previous assignment at MRC included coordinating and developing programs that support the day-to-day activities of the Chief of Staff including and not limited to conference planning.
I'm certain that my diverse experience can be of added value towards the objective of the agency.
Again, I wish to thank you for the time and effort taken in discussing the various aspects of the position.
Thank you.

Sincerely,

Answer 1

a) comma after /Staff/

b) I don't like the phrase /can be of added value towards/. Try :

my diverse experience will be an added benefit to the agency as its objectives are being met.

c) Change the word /the/ to /your/ in the penultimate sentence, then continuing ...effort as we discussed the various aspects of the position.

Sounds more conversational without being too personal.