12/16/2017 11:18 EST | Updated 12/16/2017 11:21 EST

Railway executive Hunter Harrison dead, CSX Corporation confirms

JACKSONVILLE,, United States — Railroad executive Hunter Harrison has died.

American railroad giant CSX announced the death of its current chief executive on Saturday, saying Harrison died in Wellington, Fla. He was 73.

CSX says he died from "unexpectedly severe complications from a recent illness."

Harrison, who engineered dramatic turnarounds at both Canadian Pacific and Canadian National railroads, went on medical leave from CSX earlier this week.

He had joined the company in March of this year.

CSX says it mourns the loss of, in its words, a "larger-than-life figure" and extended sympathies to Harrison's family.