Merck & Co. has announced a key leadership transition within its global manufacturing operations, as Dave Maraldo, Ph.D., assumes the role of Executive Vice President and President of the Merck Manufacturing Division (MMD). In this position, he will oversee worldwide human health manufacturing and supply operations and join the company’s Executive Team.
This appointment comes at a pivotal moment for Merck, as the company continues to scale its manufacturing capabilities to support a growing portfolio of medicines, vaccines, and biologics.

A Career Built Within Merck’s Global Manufacturing Network
Dave Maraldo brings more than 25 years of experience within Merck, having joined the Manufacturing Division in 1999. Over the course of his career, he has held a wide range of leadership roles spanning manufacturing, technical operations, commercialization, and integrated development and supply.
His trajectory reflects deep institutional knowledge and operational expertise, shaped by decades of involvement across Merck’s global manufacturing network. His leadership has been closely tied to efforts aimed at strengthening operational performance and ensuring consistent delivery of high-quality therapies.
Driving Operational Excellence In A Complex Global Landscape
As head of the Merck Manufacturing Division, Maraldo will lead a global network responsible for the production and supply of pharmaceuticals, vaccines, and biologics. His mandate centers on maintaining reliable, compliant, and patient-focused manufacturing systems.
Throughout his career, he has contributed to modernizing manufacturing infrastructure, advancing cross-functional collaboration, and building capabilities aligned with evolving scientific and regulatory demands. These priorities remain central as Merck continues to expand its role in delivering innovative health solutions.
Transition Marks End Of An Era
Maraldo succeeds Sanat Chattopadhyay, whose retirement marks the conclusion of a significant chapter in Merck’s manufacturing leadership. The transition underscores continuity within the organization, with leadership drawn from within its established operational structure.
Merck acknowledged Chattopadhyay’s contributions while emphasizing its continued focus on operational excellence and long-term value creation.
A Company Grounded In Scientific Purpose
Known as MSD outside the United States and Canada, Merck & Co. has spent more than 130 years advancing medicines and vaccines aimed at improving global health. The company continues to position itself as a research-intensive biopharmaceutical leader, working at the intersection of scientific innovation and large-scale manufacturing.
With Maraldo now leading its manufacturing division, Merck reinforces its commitment to delivering high-quality therapies to patients worldwide, while maintaining a strong emphasis on reliability, compliance, and patient-centered execution.
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Written by Nare Hovhannisyan,MD