Andrew Curry Green, 34, moved to the Los Angeles area about six months ago to become director of business development for eLogic, a Venice-based Internet company, according to Jeff Greisch, one of Green's colleagues.
"Andrew was a very hard-working, capable young man," Greisch said.
Green and Jeff Mladenik, 43, eLogic's temporary CEO, were flying back to Los Angeles after a business trip to Boston.
Mladenik, a husband and father of four, lived in Hinsdale, Ill., but made frequent trips to Los Angeles.
"It's a devastating loss," Greisch said. "A tragic, tragic event."
Green is survived by his wife, Shannon.