In this episode of the Research Forward Podcast, host David Mayo welcomes Javier Guillén, Senior Director at AAALAC International, for a deep dive into the evolving landscape of laboratory animal science and global accreditation. Javier shares his personal journey from a veterinary graduate in Spain to a global leader in animal welfare and research ethics. He reflects on the early challenges of entering the field without formal training, the importance of ethical oversight, and how international collaboration has shaped the standards we see today. Gain insight into the mission and impact of AAALAC International, the value of voluntary accreditation, and the role of a “culture of care” in advancing both science and animal welfare. Javier also discusses the importance of harmonization—not standardization—across global research environments, and how institutions can continuously improve through peer review, self-evaluation, and commitment to the 3Rs (Replacement, Reduction, Refinement). Whether you're a researcher, veterinarian, or simply curious about the ethics behind scientific progress, this episode offers a thoughtful and inspiring perspective.