Backman, the former Mets second baseman, interviewed for the team's Major League job that went to Terry Collins. Backman was an overwhelming favorite for the job in November before the team chose Collins.
In Binghamton, he succeeds another former Met player, Tim Teufel. Teufel was named the team's manager at Triple-A Buffalo last week.
Backman, 51, managed short-season Class A Brooklyn last season.
"It's exciting to be with the Mets," Backman said in a statement released by the team. "It was almost like a homecoming coming back to the Mets last year. Being traded for the first time takes a piece of you. I would say my heart never left New York."
-- C. Trent Rosecrans