While you develop the text, start off as if you were writing a personal letter.
My target market is the large financial, health science and aerospace firms.
My target audience is the President and/or CEO.
My address therefore is:
If your target market is managers in corporations "Dear Manager".
Then build your text.
Proof-read it, spell check it, and let it mature overnight.
In the morning, re-read it, make any changes, and just before it goes out the door delete the salutation; it will have served its purpose by then.