About us. Nexus Medical Training Center has a fantastic opportunity for a Dialysis Technician instructor at our beautiful school. Our school is conveniently located by the number 2,5 and 6 trains. We are “considered the best new and upcoming school in the Bronx” with perfect five-star Google reviews. Our current and past students can’t stop raving about our school. We are expanding our course offerings by adding a Dialysis Technician course and a...