Medical Science Liaison

Location

US/ Field- Los Angeles/Sacramento, CA

Reports To

Associate Medical Director | R&D

We are Reckitt

Home to the world's best loved and trusted hygiene, health, and nutrition brands. Our purpose defines why we exist: to protect, heal and nurture in the relentless pursuit of a cleaner, healthier world. We are a global team united by this purpose. Join us in our fight to make access to the highest quality hygiene, wellness, and nourishment a right and not a privilege.

Company Overview

Reckitt/Mead Johnson Nutrition (MJN) is a leading Nutrition company, focused on enhancing patient outcomes through innovative nutritional advancements and rigorous research. Our mission is providing optimal nutrition for infants and children around the world for the best start in life. We are committed to science-driven research that addresses the unique nutritional needs of the most vulnerable patients, establishing ourselves as a trusted partner by health care professionals worldwide.

​Research & Development​

In Research and Development, we're full of highly skilled talents that include Scientists, Engineers, Medical, Clinical and Regulatory professionals - all working to create a cleaner, healthier world. With nine Centres of Excellence, we continually seek out new opportunities by using science, our entrepreneurial flare and our fearless innovation to develop and enhance our existing portfolio, never compromising on quality or performance.

We do the right thing, always, by ensuring we act with responsibility and integrity, by complying with regulatory legislation across the globe, whilst ensuring our products are safe for our consumers and are to the highest quality.

The size of our organisation means you'll have the opportunity to learn and work in different functions within R&D, giving you exposure to different disciplines, teams and environments. You will also have access to our Research and Development Academy, designed to develop our team and allow you to grow in our great organisation.

About the role

The Medical Science Liaison (MSL) serves as a field-based position responsible for building and maintaining relationships with Key Opinion Leaders (KOLs) and other Health Care Professionals (HCPs) to support the medical and scientific needs of the MJN portfolio of products.  This position functions as an internal bridge between R&D and Commercial organizations (Medical Sales, Marketing, Professional Services, and National Accounts), providing comprehensive knowledge of MJN products, scientific education, research support, and clinical insights to ensure the MJN portfolio of products are understood and utilized effectively in the medical community.

Your responsibilities

• Build and maintain relationships with KOLs and HCPs.

• Provide scientific education, product information, and updates through clear presentations and discussions.

• Gather and report field insights and competitive intelligence to inform medical, innovation, and business strategy.

• Respond to medical information inquiries with accurate, timely scientific support.

• Train, mentor, and support new MSLs and the medical sales team on product science and innovation.

• Participate in advisory boards, clinical research activities, and investigator‑led studies as needed.

• Review scientific materials and contribute to publications to ensure accuracy, compliance, and clinical relevance.

• Provide clinical insights for R&D and innovation projects from early development through launch.

The experience we're looking for

• Registered Dietitian (RD); advanced certifications such as CSP, CSPCC, CLC, CNSC, or IBCLC preferred.

• Master’s degree in nutrition with strong scientific and therapeutic knowledge.

• 5–10 years of hospital experience, including direct neonatal and pediatric patient care.

• Excellent communication and presentation skills.

• Ability to work both independently and collaboratively.

• Willingness to travel extensively (50–60%, including overnights).

• Experience leading QI or research projects in hospital or academic settings; publications are a plus.

• Preferred: Medical Science Liaison Board Certification (MSL‑BC) and prior industry experience.

Desired skills and competencies:

• Accountability for achieving results and maintaining high performance standards.

• Strategic thinking and problem‑solving with consideration for long‑term impact.

• Strong patient and customer focus in all interactions and decisions.

• Solid understanding of industry regulations and compliance expectations.

• Ability to analyze, interpret, and communicate scientific data effectively.

• Strong interpersonal skills and emotional intelligence for managing relationships.

• Skilled in scientific communication, including presentations, writing, and manuscript review.

• Effective collaboration and partnership‑building across internal and external stakeholders, with deep knowledge of MJN products and the North America pediatric nutrition landscape.

The skills for success

What we offer

With inclusion at the heart of everything we do, working alongside our four global Employee Resource Groups, we support our people at every step of their career journey, helping them to succeed in their own individual way. We invest in the wellbeing of our people through parental benefits, an Employee Assistance Program to promote mental health, and life insurance for all employees globally. We have a range of other benefits in line with the local market. Through our global share plans we offer the opportunity to save and share in Reckitt's potential future successes. For eligible roles, we also offer short-term incentives to recognise, appreciate and reward your work for delivering outstanding results. You will be rewarded in line with Reckitt's pay for performance philosophy.

US salary ranges

US pay transparency

Equality