Robert Half International, Inc. Robert Half International, Inc. Search | Advanced Search | New Members | Coupons and Discounts | All Categories   Employment & Staffing >> Employment Temporary Help Services Robert Half International, Inc. 277 West Nationwide Blvd., Suite 200Columbus, OH 43215 (614) 221-7688 | fax: (614) 221-3976 Need to update your categories or expand your listing? Or want to learn how your business can become a part of the Chamber? Contact us at membership@columbus.org for assistance.