Wanderer

Put it on the alignment rack with new tires. Tell the tech to go find the root cause.
It could just be the tires or how the tires are wearing. or it could be due to toe-change or camber-change, scrub-radius,worn parts, a bad steering box, or a shock gone bad.
It could even be rear-steer from springs, shackles, mounts, or a thrust angle.
It could even be in the unibody.
So your tech-guy needs to be sharp.