Ethical misconduct continues to raise concerns among the public because of the significant impact on stakeholders. This study investigates differences among business ethics education, attitudes towards ethical decision-making, and length of work experience among MBA groups. Based on the premise that the transfer effects of business ethics education in the workplace are unknown, the researcher attempted to explore two important research questions that examine these differences, if any. Rest's (1979) Defining Issues Test (DIT-2) was employed to measure ethical decision-making among fully employed MBA graduates in the U.S. The DIT-2 measurement instrument was administered to 177 qualified participants. A Kruskal Wallis H test was used to respond to the research questions and test the hypothesis. Data analysis revealed no significant differences between business ethics education and attitudes towards ethical decision-making (p > 0.05). However, there were significant differences between the length of work experience and attitudes towards ethical decision-making (p < 0.001). This information may be relevant to businesses and academia to further collaborate with the aim of improving ethical decision-making in the workplace. Repeating this study with larger sample sizes is recommended for future research because of the challenges of defining groups. There does not appear to be anyone who fits into the "informal business ethics education training" groups or the "neither formal nor the informal business ethics education" training. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]