I think it is great that he wrote about his story. The way the law is written he'll have to leave the country unless someone pulls some major strings for him. I'm a little more surprised about everything that is included in the article however. Specifically the following bit:

By this time, Peter, who still works at The Post, had become part of management as the paper's director of newsroom training and professional development. One afternoon in late October, we walked a couple of blocks to Lafayette Square, across from the White House. Over some 20 minutes, sitting on a bench, I told him everything: the Social Security card, the driver's license, Pat and Rich, my family.

This indicates that Peter Perl was a manager at the Post and knowingly continued to employee an undocumented worker opening the Post and himself to liability including possible criminal penalties.