The U.S. railroad industry is facing critical knowledge loss of invaluable safety leadership expertise due to employee separations and a retiring workforce. The Federal Railroad Administration (FRA) sponsored TrueSafety Evaluation, LLC, in partnership with Perigean Technologies, to conduct research on Expertise Management (EM), a knowledge-management approach centered around Cognitive Task Analysis (CTA) that uses a suite of methods to elicit, analyze, and represent expertise so that it can be reintroduced into the organization. As part of this effort, the research team developed and implemented an EM Framework to identify, capture, and transfer critical knowledge from experienced railroad employees to newer staff. This research was conducted from September 2022 to February 2024.