Paola Mina-Osorio MD, PhD 

For most biotechnology companies, Latin America is not a strategic priority. That is usually understandable. The United States remains the world's largest biopharmaceutical market. Western Europe combines world-class academic research, mature clinical research infrastructure, established regulatory systems, and large commercial markets. Central and Eastern Europe has long been valued for experienced investigators and efficient patient recruitment. China, Japan, and other Asia

Women are entering STEMM in growing numbers. But recruitment is only the first step. Burnout, caregiving, motherhood penalties, and prove-it-again bias still shape who stays, advances, and leads. For Latinas and other underrepresented women, those pressures may carry added layers. Retention is not only a workforce issue. It is an equity issue.

Mentoring helps people grow. Sponsorship helps people move. Systems decide who advances. In this final piece of my series, I examine the hidden structures that shape career outcomes in STEMM: informal networks, pattern matching, visibility, and who gets trusted with risk. If the same outcomes keep repeating across organizations, this is not just about talent or effort. It is also about system design and how opportunity is actually distributed.

Part 2 of a series on mentoring, sponsorship, and the systems that shape careers in STEMM I have not had many mentors in my career. What changed my trajectory was the handful of sponsors I had. The people who spoke my name in rooms I was not in backed me when an opportunity opened, and took a risk on me before the outcome was obvious. That is the difference. Mentors advise. Sponsors advocate. The research base on sponsorship is smaller than the mentoring literature , and muc