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This study meticulously probes the evolution of engineering undergraduates' attitudes and skills related to renewable energy and sustainability over two years at two institutions in the Southeastern United States. Data were intensively collected in two phases – fall 2022 and spring 2024 – amassing over 250 initial and upwards of 200 follow-up responses. This rigorous effort culminated in over 150 complete and matched datasets subjected to detailed examination. A bespoke, five-part survey was employed to capture the complex spectrum of students' attitudes. Our analytical approach incorporated ANOVA; these results indicated minimal group variances across most survey dimensions, hence suggesting a uniformity in perceptions. Paired sample tests brought to light a minor, but statistically significant increase in sustainability-related knowledge. The educational methods employed included hands-on projects, seminars, and group assignments focused on various aspects of renewable energy and sustainability. These incremental yet impactful changes highlight the potential of precise educational strategies to effectively mold student perspectives towards sustainability. By integrating solid statistical techniques and delving into the broader educational implications, this study provides valuable insights into the refinement of a sustainability-centered engineering curricula.