Map for KOLNICKI, PETERSON & WIRTH, LLC Map for KOLNICKI, PETERSON & WIRTH, LLC Search | Advanced Search | New Members | Coupons and Discounts | All Categories Business & Professional Services >> Accountants - Certified Public KOLNICKI, PETERSON & WIRTH, LLC 1400 Opus Place, Suite 100Downers Grove, IL 60515 | directions (630) 390-1140 | fax: (630) 390-1150 Visit Site If your business isn't here, contact us today to get listed!