Staffing firm On Assignment acquires government services contractor for $775 million

Calabasas staffing firm On Assignment Inc. will acquire government services contractor ECS Federal in a $775-million cash deal, the two companies said Wednesday.

Shares of On Assignment were up 9.3% at $75.31 around 9:45 a.m. PST.

Founded in 1985, On Assignment began as a lab support staffing agency…