You need two find requests. You enter find mode and specify the criteria for your school year, then create a new request and specify the omit request to omit closed Jobs. Then you perform the find.
Find the records for your school year, then return to find mode specify the omit request and constrain the found set instead of performing a find.
Thanks again Phil,
I was trying to perform two separate finds...not doing a new request. With the new request it works like a champ.