The 250,000-square-foot, two-building complex at 999 Stewart Ave. was largely vacated late last year when high-risk auto insurer Robert Plan Corp. hit the skids. It filed for bankruptcy last week.

Built in 1965, the 233,000-square-foot office building on 17.56 acres at 1055-1065 Stewart Ave. was once part of the sprawling Grumman industrial campus.

Comforce Corp., a nationwide provider of skilled temporary and contract workers, has moved to Bethpage. Its new headquarters office is at the Sterling Corporate Center, 999 Stewart Ave. in Bethpage.