Jean Nachtman Finance Director, January 2016. Nachtman was the Assistant Finance Director for twelve years. She was formerly Manager Service Company Accounting for Alliant Energy Corporation and District Auditor for Interstate Power Company. Nachtman has an undergraduate degree in Accounting and Business Administration, and an MBA from the University of Dubuque. She is a Certified Public Accountant and Certified Public Finance Officer, a member of the Iowa Society of CPA's ,the Government Finance Officer Association, and the Association of Public Treasurers of the United States and Canada.