Main Office 1706 North 16th Street Quincy, IL 62301-1404 PO Box 1007 Quincy, IL 62306-1007 Main Number 217-224-8484 Fax 217-224-0504 dgkoch@dgkochcpa.com Dennis G Koch, CPA, CGFM Owner dgkoch@dgkochcpa.com John Niemeyer, CPA, MBA Senior Staff Auditor jniemeyer@dgkochcpa.com Send us a message Contact Us First Name * Last Name * Email * Subject * Message * reCAPTCHA Submit