Who Was Stockton Rush, Pilot of the Titan Submersible?

From a New York Times obit by Sam Roberts headlined “Stockton Rush, Pilot of the Titan Submersible, Dies at 61”:

Stockton Rush, the chief executive and founder of OceanGate and the pilot of the Titan submersible, was declared dead on Thursday after his vessel was found in pieces at the bottom of the Atlantic Ocean, near the rusting wreck of the R.M.S. Titanic.

Mr. Rush oversaw finances and engineering for OceanGate, a privately owned tourism and research company based in Everett, Wash., which he founded in 2009. In 2012, he was a founder of the OceanGate Foundation, a nonprofit organization that encouraged technological development to further marine science, history and archaeology.