MIAMI, FL, May 15, 2026 /24-7PressRelease/ -- Romina Zelezniak has been selected for inclusion in Marquis Who's Who, recognizing her outstanding leadership, strategic impact, and contributions to the pharmaceutical and biotechnology industries across Latin America and the United States.

Born and raised in Buenos Aires, Argentina, Ms. Zelezniak has built a distinguished international career defined by commercial growth, business transformation, and regional leadership within some of the world's leading healthcare organizations. With more than 20 years of experience across Merck Group, Johnson & Johnson/Janssen, and Gador, she has become widely recognized for her ability to lead complex organizations, shape regional growth strategies, and drive high-impact execution across emerging markets.

Currently serving as Head of Strategy & Operations, Chief of Staff for Latin America, and Regional Fertility Lead at Merck KGaA, Darmstadt, Germany (EMD Serono), based in Miami, Ms. Zelezniak has played a critical role in defining and executing the company's fertility growth strategy across Latin America, including Brazil and Mexico. Through influence-driven leadership and close collaboration with regional and country teams, she has contributed to multiple consecutive years of double-digit profitable growth across key markets.

One of Ms. Zelezniak's most notable achievements has been the development of a regional fertility strategy that strengthened alignment, engagement, and commercial execution across diverse teams and markets. By fostering collaboration, listening closely to local teams, and transforming insights into actionable strategies, she successfully partnered with business unit heads and general managers to accelerate growth and organizational performance throughout the region.

Prior to her current role, Ms. Zelezniak held several senior leadership positions at Merck Group, including Business Unit Head for Fertility, Endocrinology, Neurology, and Immunology in Argentina and Latin America, where she led strategic initiatives, portfolio growth, and cross-functional transformation efforts across multiple therapeutic areas.

Earlier in her career, she held progressive commercial and marketing leadership roles at The Janssen Pharmaceutical Companies of Johnson & Johnson, where she successfully led regional strategies and launches across HIV, hepatitis C, immunology, oncology, hematology, multiple sclerosis, and specialty care portfolios throughout Latin America. Her leadership contributed to significant business growth and strengthened the organization's position across several key therapeutic areas.

In addition to her professional achievements, Ms. Zelezniak has been recognized for her leadership and impact through multiple corporate awards and by being featured in Forbes Women in Corporate Roles. She holds an MBA in International Business from Florida International University and a Bachelor's degree in Marketing from Universidad de Palermo.

Ms. Zelezniak credits her success to resilience, perseverance, and the ability to lead through influence and collaboration. Her career continues to reflect a strong commitment to innovation, strategic leadership, and advancing healthcare across the region.

Beyond her corporate responsibilities, Ms. Zelezniak is committed to civic engagement as a donor with Tzedaka, reflecting her dedication to giving back to the community.

In her personal life, Ms. Zelezniak is a single mother who conceived her daughter through IVF. She enjoys playing tennis and volleyball with her daughter during their leisure time. Looking ahead, she aspires to become general manager overseeing operations in Argentina while supporting her daughter's journey toward independence and kindness.

Throughout her career, Ms. Zelezniak has championed women's empowerment—particularly encouraging women across Latin America and the Middle East not to let motherhood limit their ambitions or professional growth. Her legacy is defined by strategic vision, collaborative leadership and an unwavering commitment to both personal fulfillment and professional excellence.

About Marquis Who's Who®:
Since 1899, when A. N. Marquis printed the First Edition of Who's Who in America®, Marquis Who's Who® has chronicled the lives of the most accomplished individuals and innovators from every significant field of endeavor, including politics, business, medicine, law, education, art, religion and entertainment. The suite of Marquis® publications, including Who's Who in America® and Who's Who in the World®, remains an essential biographical source for thousands of researchers, journalists, librarians and executive search firms around the globe. Marquis® publications can be viewed at the official Marquis Who's Who® website, www.marquiswhoswho.com.

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