Douglas E. Ziegenfuss joined the Department of Accounting in 1989 as an Assistant Professor. He teaches Business Assurance (Auditing) courses. His research investigates internal auditor ethical decision making, audit quality, fraud examination, forensic accounting, and teaching assurance services.

Professor Ziegenfuss received his Ph.D. from Virginia Commonwealth University in 1989, a MS in Accounting from American University in 1980, and a BA in Philosophy and History from Mount Saint Mary's College (Maryland) in 1976. he is a CPA, CMA, CIA, CFE, CGFM, CCSA, AND CISA. He previously worked eight years as an auditor or audit manager in the public accounting and utility industries.