A cement truck driver was convicted Wednesday of killing a 45-year-old school bus driver and seriously injuring a 64-year-old attendant in a crash in Locust Valley two years ago.

A Nassau County jury found Raymond Ragen guilty of manslaughter and assault, but acquitted him of vehicular homicide and vehicular manslaughter.

Authorities said the 45-year-old was driving his truck eastbound on Oyster Bay Road when he crashed into a Long Island Rail Road overpass near Matinecock Court on July 23, 2012.

The truck then hit a westbound school bus, killing its driver, 45-year-old Jorge Guevara of Locust Valley. Four boys and a 64-year-old man on the bus were treated for minor injuries.

Ragen faces 5-to-15 years in prison on the manslaughter conviction when he’s sentenced May 23 by Judge William Donnino.