Ernest Miller Hemingway (July 21, 1899 – July 2, 1961) was an American novelist, short story writer, and journalist. His economical and understated style had a strong influence on 20th-century fiction, while his life of adventure and his public image influenced later generations.
Hemingway produced most of his work between the mid-1920s and the mid-1950s, and won the Nobel Prize in Literaturein 1954. He published seven novels, six short story collections, and two non-fiction works. Additional works, including three novels, four short story collections, and three non-fiction works, were published posthumously. Many of his works are considered classics of American literature.
from
https://en.wikipedia.org/wiki/Ernest_Hemingway
His early career in journalism
See
http://ehto.thestar.com/marks/how-hemingway-came-of-age-at-the-toronto-star
from
http://www.history.co.uk/biographies/ernest-hemingway
and
https://www.google.co.nz/search?q=was+hemingway+a+journalist&rlz=1C1CHBD_enNZ698NZ698&oq=was+hemingway+a+journalist&aqs=chrome..69i57.12034j0j8&sourceid=chrome&ie=UTF-8

picture from
http://www.journalistandwriter.wordpress.com