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Global Clinical
​​​​​​​Trial Operations
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Our clinical journey for patients
Global Clinical Trial Operations (GCTO) oversees all operations involved in executing clinical studies for biologics, vaccines, and small molecules. We are a diverse, driven team dedicated to helping to save and improve lives. Our commitment to patients guides everything we do.

We structure our work and strategic goals around:

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People
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Products
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Productivity
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Partnership

Our organization

GCTO functions collaborate to drive the clinical trial process forward across three therapeutic areas: oncology, vaccines and infectious diseases, and general medicine.
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Clinical Sciences & Study Management
Manages the execution of our clinical trials.
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Medical Writing
Prepares high-quality documentation from protocols through marketing applications.
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Regions & Regional Operations
Executes and monitors clinical studies across four regions in accordance with all required plans, standards, policies and procedures.
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Global Data Management & Standards
Delivers clean, reliable, credible, reproducible data to prove the efficacy and safety of products in development.
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Headquarter Operations
Provides centralized services for project management, operational reviews, metrics, meeting management, resource planning, vendor operations and vendor management.
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Quality & Continuous Improvement
Establishes and maintains a robust quality management system, implements quality plans, and promotes inspection-readiness and continuous improvement initiatives.
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Clinical Imaging & Pathology
Partners collaboratively on clinical trial teams for studies in which clinical imaging or pathological assessments are performed.
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Monitoring Excellence, Site Development/Engagement & Trial Diversity (MESD)
Develops strategy and site monitoring tools and processes to position our company as the partner of choice.
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Risk Evaluation & Adaptive Integrated Monitoring
Furthers the organization’s risk-based quality management through advanced analytics.

How we work
Our work is guided by principles of quality, innovation, adaptability, and partnership. GCTO is a people-focused organization that fosters a flexible, diverse, equitable, inclusive, and collaborative workplace. Our colleagues are supported throughout their career, from onboarding to training and development. We also provide resources for working remotely, staying well, volunteering, and more.
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The Emerging Talent Rotational Program 
The program will provide incoming talent, increased exposure to various roles within GCTO and development opportunities promoting broader cross-functional understanding.

The program consists of a 21-24 month robust hands-on learning opportunity.  During three, 6 month rotational assignments, the Emerging Talent Rotation Associates (ETRA) will receive general GCTO US onboarding training, foundational training in clinical research, and exposure to several roles in Country Operations and the CSSM and GDMS organizations. 

At the conclusion of their rotational assignments, the ETRAs will be better equipped to advance their careers within Merck, with opportunities in the various roles within the GCTO organization. 

What we do

GCTO executes diverse studies across all phases of development to get new medications to the patients who need them. We are involved in every step of clinical trial operations. 
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Clinical trial planning
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Clinical trial execution
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Locked database
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Documentation for regulatory submission

Our story by the numbers

Annually, GCTO manages approximately:
300
Late-stage development clinical trials
220
External collaboration and joint venture studies
19k
Active sites
70k
Active patients
125k
Monitoring visits
310m
Clinical data points

Hear from our employees who work to save and improve lives every day

Our legacy and commitment, through philanthropy, to address complex global health challenges and improve the quality of life in communities inspires me!
Adrelia Allen
Executive Director, Clinical Operations

It is a privilege to work with a dedicated team in Clinical Sciences and Study Management Oncology who are passionate about our purpose: to help improve the lives of our patients around the world with our novel medicines.
Andrea Perrone
Associate Vice President, Clinical Operations

I am truly inspired to come to work every day because I feel that I work for an ethical company, and I have a direct impact on the health and well-being of humankind.
Chanelle McCullum
Senior Director, Clinical Research

One’s career is a journey of defining moments. Embracing the teachable moments of that journey fuels my passion to authentically lead with integrity, operate in excellence, and generously extend compassion.
Kathy Taylor
Senior Director, Clinical Operations

Here, we have a long history in working to improve people’s lives. I am proud to continue that legacy with our work in the vaccine and infectious disease areas.
Elizabeth Desrosiers
Associate Vice President, Clinical Operations

In Global Data Management and Standards (GDMS) – we are charged with delivering accurate and reliable clinical safety and efficacy to stakeholders who use that data to make important decisions that positively impact patients all over the globe. Data is our currency – and in GDMS, we make a difference.
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Chris Lamplugh
Associate Vice President, Clinical Operations

The work that we do matters. Every day, the clinical trials that we run bring life-changing medicines one step closer to market.
Aldona DiSandro
Associate Specialist, Clinical Research, Monitoring Management 

Our Medical Writing team is at the forefront of innovating the clinical documentation process to improve quality, increase compliance, and accelerate time-to-market of important medicines to help save and improve patient lives.
Meredith Murray
Principal Scientist, Clinical Operations

Here, Clinical Research is incredibly innovative and novel clinical trials are driven by an amazing team of enabled, empowered, and talented individuals.
Michelle Metry
Executive Director, Clinical Research

I’m humbled by and proud of the tremendous work done by our skilled and dedicated colleagues around the globe, executing the highest quality clinical research every day and bringing treatments to patients with unmet medical needs.
Andy Lee
Sr. Vice President and Head, Global Clinical Trial Operations
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This careers website is intended for Residents of the United States, Canada & Puerto Rico. Residents in other markets, please visit our MSD Careers page. Information on this site is for the purpose of presenting career opportunities at our organization and give our audience a view of our culture, diversity and growth opportunities. Our Company is an equal opportunity employer, Minority/Female/Disability/Veteran, proudly embracing diversity in all of its manifestations.