Objectives/Goals: To evaluate an undergraduate nursing externship revised to integrate the updated International Association for Clinical Research Nursing (IACRN) curriculum, designed to strengthen knowledge, skills, and career readiness for the specialty of clinical research nursing (CRN). Methods/Study Population: A 192-hour, 8-week summer externship was conducted at the Rockefeller University (2022–2025), accepting two rising junior nursing students annually. The curriculum included lectures on clinical research principles and processes, IRB observation, informed consent simulation, a mock IRB, and rotations in bionutrition, pharmacy, bioinformatics, and laboratory processing. Externs also completed the Collaborative Institutional Training Initiative on Good Laboratory Practice and lab safety modules. Program evaluations included a pre- and post-test, a 30-item knowledge exam to assess understanding of clinical research concepts, as well as ratings by the mentors across professional competencies, and open-ended questions to obtain feedback from the externs. Results/Anticipated Results: Externs’ knowledge scores rose from pretest averages of 58–70% to post-test scores of 73–86%, a gain of ~20 points. Surveys revealed an improved understanding of research processes, particularly in areas such as informed consent and protocol design. Hands-on activities, lab processing, dietary simulation, and pharmacy were most valued. Mentors consistently rated externs as “Good” to “Excellent” in terms of professionalism, adaptability, and teamwork. Externs reported a greater interest in CRN careers and a deeper appreciation for the specialty’s breadth. Discussion/Significance of Impact: This externship, which embedded updated IACRN competencies at the undergraduate level, successfully enhanced knowledge and understanding of the field. Its innovative, replicable model demonstrates how early exposure can expand the clinical research nursing pipeline and prepare future CRN leaders.