Republican Ohio Gov. Mike DeWine said it is the largest single job creation and payroll project that Ohio has announced. U.S. defense contractor Anduril Industries is preparing to build a massive advanced manufacturing facility in central Ohio, adding a planned 4,000 jobs to the area’s burgeoning high-tech sector, state officials announced Thursday.The Cosa Mesa, California-based defense technology company plans to begin construction of what it’s calling “Arsenal 1” as soon as state and local approvals are secured.