Hegre, McMahon, & Schimmel, LLC in Oak Brook can handle your organization's taxes. We typically provide services for small to medium sized businesses. Call us today for more information. New customers receive 15% off! We have CPA Offices in Oak Brook, IL and Merrillville, IN, serving all surrounding areas including Oak Park, Downers Grove, Elmhurst, Lombard, IL, Valparaiso, Crown Point, Hammond, IN.