Hacker, Nelson & Co. PC210 7th Avenue SE, Waukon, IA 52172 View Map 563-568-4567 Website Email Hacker, Nelson & Co., P.C. has been dedicated to helping clients succeed in business for over 25 years. We expanded by purchasing a firm in New Hampton, IA in 2004. Our two offices consist of 3 partners and over 15 staff members, including 12 CPA's.