Ok. this article says he was a backhoe operator. (maybe a backhoe and crane operator are the same? Link calls it crane, article calls it backhoe)
Lots of info at the link below.
http://www.nbcphiladelphia.com/news/local/Crane-Operator-Had-Drugs-in-His-System--210608021.html
Sean Benschop, 42, will face six counts of involuntary manslaughter as well as counts of risking a catastrophe and reckless endangerment for his role in the collapse, sources say.
Philadelphia Police detectives raided Benschop's home along the 4900 block of North 7th Street in the Olney section of Philadelphia around 4:30 p.m. Friday
Benschop's whereabouts are currently unknown. Neighbors tell NBC10 that investigators were asking them if they had seen the man. Neighbors replied they hadn't seen him in some time.
Benschop is a convicted felon and lists himself as self-employed, sources say.