Administrative Staff Carol Duffy Administrative Assistant cjduffy@wisc.edu | 608.262.0485 Julie Garvin Graduate Program Manager jgarvin2@wisc.edu | 608.262.2239 Matt Hahne Department Administrator mdhahne@wisc.edu | 608.263.5744 Madeilene Hoffman Payroll & Benefits Specialist mbhoffman4@wisc.edu | 608.265.2951 Troy Humphrey Instrument Maker tchumphrey@wisc.edu | 608.263.5880 Ryan Ihrke Financial Specialist rihrke@wisc.edu | 608.262.2633 Andy Larson Agricultural Equip. Operator alarson29@wisc.edu | 608.263.5880 Keith Schiller User Support Specialist schiller@wisc.edu | 608.262.2752 Zach Wyman Academic Advising Manager zwyman@wisc.edu | 608.265.2925