Naperville, ILReal Estate Agent at Wheatland Realty John Guill has been a real estate professional working in the commercial retail and office industry since 2003. His primary focus has been leasing and property... John Guill has been a real estate professional working in the commercial retail and office industry since 2003. His primary focus has been leasing and property management. John was licensed in Illinois as a Real Estate Salesperson in November of 2005 and became a member of National Association of...