Merck account map & org chart

Merck here is Merck & Co., Inc. of Rahway, New Jersey — "Merck" in the United States and Canada, "MSD" everywhere else. Ten executives sit on the Executive Team with Chairman and CEO Robert M. Davis¹. Dean Y. Li runs Merck Research Laboratories, the company's R&D organization. Dave Maraldo runs the Merck Manufacturing Division. Human-health commercial work is split in two: Jannie Oosthuizen leads Oncology and MSD International, and Brian Foard leads Specialty, Pharma & Infectious Diseases¹³. Richard R. DeLuca, Jr. runs Merck Animal Health, the company's second reporting segment.

• We found 551 Merck teams hiring in the past four quarters, and 9,292 leaders at Associate Director level or above. All of it from public sources.
• Cardiovascular Disease posts the most roles (134, a field organization posting across U.S. territories), then Vaccines (89, 3.6 times its prior window), Analytical R&D (61) and Technical Product Management (58). Clinical Research is growing fastest, from 5 roles to 36. Observed postings across the company grew 2.2 times window over window, so read every unit's multiple against that baseline.
• Most of the hiring is in the United States (2,539 location listings), then India (236) and Singapore (83). Rahway, the headquarters, is the busiest city with 656, followed by the Pennsylvania cluster of North Wales (324), Lansdale (163), Upper Gwynedd (162) and West Point (159).
• Merck reports its business in two operating segments: Pharmaceutical and Animal Health¹⁵.

The 30 most active units by open roles in the trailing four quarters, of 551 units with any hiring activity in the window (drawn from 5,259 verbatim-extracted unit-name candidates). Rows are centers of activity, not an org chart — several (therapeutic areas especially) sit inside larger divisions rather than beside them. = corroborated by 2+ independent sources.

Reading the momentum column

Momentum is the unit's own posting count, last four quarters vs the four before: ▲ 2.0× = twice as many postings. The arrow marks units moving well beyond (or against) the company-wide trend — observed Merck postings grew 2.2× window-over-window, so a unit can show a multiple above 1.0 with no arrow (it merely rode the surge) or a down-arrow at 1.5× (it lost share). Too little history shows "—" rather than a noisy number.

How to use this page. A unit gaining hiring share is standing up capacity — the best moment to engage is while teams and tooling are still being chosen. A unit losing share may be post-reorg, outsourcing, or completing a build-out; treat the flag as a prompt to ask, not a conclusion.

Posting locations for the trailing four quarters of hiring, aggregated across all mapped units. Counts are location listings — a posting advertised in several locations counts once per location, so totals exceed distinct postings. Use this to route territory and plan on-site coverage.

Named Associate Director+ leadership for the busiest centers of work. Every row is flagged for currency: verified = confirmed as current during this snapshot's verification pass (a web check, an active-position signal, or the company's own page); verify = sourced but not recently re-confirmed — check before outreach. In this public edition, a lock marks a leader named in the full map.

Centers whose own staff lead-author peer-reviewed papers, from author affiliations in the scientific literature (2023–2026). Papers attach to a center only when the paper's affiliation names it exactly, so counts are lead-authored published evidence, not a census; 75 mapped centers carry publications in total. Several of these centers barely hire publicly — the literature is the only channel that surfaces them.

The full map lists each center's papers, the diseases, targets, techniques, and instruments they name, and which leaders close the author list on the center's own work — independent corroboration that they run the group.

Merck's stated leadership structure, drawn as reported: the Executive Team as the company lists it¹, with each executive's organization taken from their own profile page, the 2025 operating- structure announcement, or the careers site. Every numbered superscript links to its source. A blue count on a card marks an organization whose internal structure is mapped in the following sections: official sub-organizations as boxes, observed teams as ◦ chips. Merck reports two operating segments — Pharmaceutical and Animal Health¹⁵ — and the Animal Health card is the whole of the second one.

Reading order for the next two sections: Merck Research Laboratories first — the largest mapped organization — then the Manufacturing Division, Animal Health, and the two human-health commercial organizations. The two commercial presidents are drawn as single boxes: Merck publishes their scope but not their internal structure, and the commercial-side centers appear in the leadership tables above.

Boxes are official organizations as Merck describes them on its careers site¹⁷ — recruiting copy rather than a governance source, so treat the boxes as the company's own description of how MRL is arranged, not a reporting chart. Muted chips marked ◦ are teams observed in Merck's hiring activity and scientific literature (the mined corpus behind the rest of this map), attached beneath the official unit they sit in; a gray "5 roles·4q" means 5 open roles observed for that team in the trailing four quarters.

The Merck Manufacturing Division and Merck Animal Health mapped the same way — official cited boxes, observed ◦ chips — with the two human-health commercial organizations and Merck's reporting segments below.

Is this Merck the same company as MSD?

Yes. This page covers Merck & Co., Inc., headquartered in Rahway, New Jersey. It trades as "Merck" in the United States and Canada and as "MSD" everywhere else. It is not Merck KGaA, the Darmstadt, Germany company, which is a separate business; nothing from Merck KGaA is in this map.

How is Merck organized in 2026?

Ten executives sit on the Executive Team with Chairman and CEO Robert M. Davis¹. Dean Y. Li runs Merck Research Laboratories, Dave Maraldo runs the Manufacturing Division, and Richard R. DeLuca, Jr. runs Merck Animal Health. Human-health commercial work is split between Jannie Oosthuizen (Oncology and MSD International) and Brian Foard (Specialty, Pharma & Infectious Diseases). The corporate functions are finance (Caroline Litchfield), legal (Jennifer Zachary), human resources (Betty Larson), strategic access, policy and communications (Chirfi Guindo), and information and digital (Gaurav Gupta). Merck reports two segments: Pharmaceutical and Animal Health.

Who leads Merck's research and development?

Dean Y. Li, Executive Vice President and President of Merck Research Laboratories, the organization that covers discovery through late-stage development, regulatory affairs, clinical trial operations, and pharmaceutical sciences. A Senior Vice President inside MRL heads global clinical development and serves as Chief Medical Officer.

Which Merck units are hiring the fastest in 2026?

Compared with the four quarters before, Clinical Research grew 7.2 times (5 roles to 36), Technical Product Management 5.3 times (11 to 58), Outcomes Research 4.8 times (4 to 19), Chronic Care 4.7 times (3 to 14), Project Management 4.3 times (3 to 13), Learning & Development 4.2 times (6 to 25), and Vaccines 3.6 times (25 to 89). Observed postings across the company grew 2.2 times, so all seven are growing faster than Merck as a whole. By volume, Cardiovascular Disease posts the most roles (134), then Vaccines (89) and Analytical R&D (61).

Where is Merck hiring?

Mostly in the United States, which accounts for 2,539 location listings. The busiest cities are Rahway (656), North Wales (324), Lansdale (163), Upper Gwynedd Township (162), and West Point (159). Outside the U.S., India has the most (236 listings, mainly Hyderabad and Pune), then Singapore (83) and Japan (48).

What is an account map?

A view of a large company one level below the org chart: the named teams and departments where budgets get spent and vendors get chosen. We rank them by hiring activity and show who leads them, using only what the company makes public. That means job postings, scientific papers, leadership pages, and SEC filings. This page is the redacted version; the full PDF names every leader we identified.