The history of engineering ethics in the United States is described through four phases, from implicit ethics and loyalty to clients to a more expansive focus on public safety, health, and welfare, with engineering education evolving in parallel to include a greater emphasis on professional ethics. Over time, significant advancements were made, including the formal adoption of ethics codes by engineering societies such as the NSPE and IEEE, which now stress public responsibility due to various historical events and increasing societal awareness. As we look toward the future, a "policy turn" in engineering ethics suggests a growing consensus that personal ethics alone are insufficient and must be complemented by considerations about institutional policies and societal impacts, potentially leading to a transformative concept of "post-engineering."