Is the use of the semicolon and the word conversely correct in this sentence: "I find the proposed schedule to be very disagreeable, and; conversely, I am in agreement with Bob's comments in his e-mail."?

The use of the semicolon and "conversely" is close, but not quite correct.

I'll fix the semicolon problem first:

I find the proposed schedule to be very disagreeable; conversely, I am in agreement with Bob's comments in his e-mail.

"Conversely" is an adverb that introduces a statement or idea that reverses one that has just been made. For instance:

I find the proposed schedule to be very disagreeable; conversely, it allowed more free time for our coworkers to intermingle.

Hope this helps!