Prior research on engineering students’ understandings of ethics and social responsibility has produced mixed and sometimes conflicting results. Seeking greater clarity in this area of investigation, we conducted an exploratory, longitudinal study at four universities in the United States to better understand how engineering undergraduate students perceive ethics and social responsibility and how those perceptions change over time. Undergraduate engineering students at four U.S. universities were surveyed three times: during their 1st (Fall 2015), 5th (Fall 2017), and 8th semesters (Spring (...) 2019). The students who completed all three surveys (_n_ = 226) comprise the sample that was analyzed in this paper for changes in their scores on five instruments: Fundamentals of Engineering/Situational Judgment, Moral Disengagement, ABET Engineering Work and Practice Considerations, Macroethics, and Political and Social Involvement Scale. We found that students modestly increased their knowledge of ethics and ability to apply that knowledge in situations calling for them to exercise judgment. In addition, they consistently indicated that health and safety considerations in engineering were of highest importance. They also showed steady levels of social consciousness over time, in contrast to other studies which detected a culture of increasing disengagement in engineering students throughout the four years of their undergraduate studies. (shrink)