Government Contractor Regulations

Can you find any grammatical errors in this sentence? Thanks?
——————–
The existence of this institution has been able to raise the public confidence in national bank. With supports from experienced advisors in banking sector, the contractor is able to assist the government in developing necessary operational policies, procedures and regulations from this institution. Although in the beginning of the project, the contractor faced a a complex banking system, they could cope with it very well.
The existence of this institution has been able to raise (Delete “the”) public confidence in national bank. (If this is the name of the bank it should be capitilized with “N”&”B”. If not, what national bank is it?) With support (Delete “s”) from experienced advisors in (add “the”) banking sector, the contractor is able to assist the government in developing necessary operational policies, procedures and regulations from this institution. Although in the beginning of the project, the contractor faced a (Del extra “a”) complex banking system, they could cope with it very well (period)
English is my wife’s 3rd language and I found myself doing this a lot while she was in college. Based on how you used the word “the”, I would guess it’s at least your second, as the rest of the structure isn’t bad. If that’s the case, very well done.
Your paragraph is very heavy with 2 cent words combined with long-ish sentences though. If there were a way to simplify what you’re saying it would be easier to digest it. Try thinking about it in conversational terms and space out your bigger words into different sentences if possible. If this is for a verbal presentation it will be especcially difficult for people to follow. Research conversational speech in the “active” voice. It’s both easier to read and hear without detracting from the meaning. Broadcasters write this way as it is easier for the audience to digest. Subject, verb, object. Example: “This institution’s existence has raised public confidence in the national bank.” Short sentences no longer than 18-21 words. This approach is also popular in memos and briefs as it is more engaging to the listener/reader.
Don’t listen to the folks bashing you for asking to check spelling and grammar. It always helps to have someone proofread your stuff because everyone makes mistakes. Everyone. Journalists and editors do it all the time. You’re not going to learn by getting it from a text. You learn by doing.
Even some of the folks looking at your work here made mistakes in correcting yours.
(Just think; I got horrible grades in English back in high school…)
Good luck.
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