What potential employers would a music publisher have?

The publisher must have an effective staff of professional managers (those who actually promote the songs) who not only know what artists are recording and the type of material needed for a particular session, but who also have a good working relationship with record company A&R executives, producers, recording artists etc.

The publisher must have an effective staff of professional managers (those who actually promote the songs) who not only know what artists are recording and the type of material needed for a particular session, but who also have a good working relationship with record company A&R executives, producers, recording artists ..

Explanation:

do you have options?

“way of writing” should be replaced with “writing style"

“idea” should be replaced with “purpose.”

maybe   “people from a long time ago” should be replaced with “elizabethans.”