CN, BNSF And KCS national academy of railraod sciences?

im positive that these three railroads most likely would give preference to nars graduates since bnsf operates nars, kcs says that they will hire you if you have a conductor certificate or will train you to get one, and CN lists NARS and MODOC on there website, and was wondering if anyone agrees with me and if there are any other cl 1 railroads and shortlines you know of that give preference to nars graduates?