If you’re looking for guys serious in both learning and earning a parnassah, I would advise you to look for yeshiva/college guys. Going to college as preparation for getting a job eventually is more widely accepted among serious learners than having a job before getting married. They’ll want to learn for a year or two, but they believe their role as a husband ultimately is to be the earner. I’m not saying that serious learners/workers don’t exist, but if you’re having trouble finding them, this may be a solution 🙂
(Ner Yisrael has some yeshiva/college guys, but I don’t think you’ll find guys there who are working. I don’t know who to contact there, sorry.)
Hatzlacha