Mercer Mercer Search | Advanced Search | New Members | Coupons and Discounts | All Categories   Business & Professional Services >> Consultants Mercer 325 John H. McConnell Boulevard, Suite 350Columbus, OH 43215 | map | directions (614) 227-6389 Visit Site 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.