Medical Science Liaison (MSL): A Key Player in Scientific & Medical Innovation

1. What is a Medical Science Liaison (MSL)?

1.1 Definition and positioning of the role

A Medical Science Liaison (MSL) is a doctorate-trained healthcare professional attached to the medical affairs or scientific affairs department of a pharmaceutical company or biotech. Their core function is to build and maintain non-promotional scientific exchanges with Key Opinion Leaders (KOLs), clinical investigators and specialist hospital pharmacists.

This positioning is the heart of the role. The MSL does not sell: they inform and engage. This boundary, governed by industry guidelines and professional standards, shapes every aspect of their field activity. They have no prescribing objectives, do not attend sales calls, and play no part in tendering processes.

1.2 MSL, RMR, Medical Advisor: what are the differences?

The same role exists under several job titles depending on the company. Here are the key distinctions worth knowing:

In practice, MSL and RMR are often used interchangeably in French job postings and are grouped under the same reference profile by the LEEM. The Medical Advisor, by contrast, is predominantly an HQ-based role: producing scientific materials, supporting Market Access teams and interfacing with regulators, without regular field visits.

Other common job titles in France and internationally include: Scientific Coordinator, Regional Scientific Expert, Regional Scientific Manager, Clinical Science Liaison, Regional Medical Director.

1.3 The MSL role in the pharmaceutical industry in 2025–2026

Demand for MSL profiles has intensified across several segments since 2023. Oncology accounts for the majority of open positions: ADCs (Antibody-Drug Conjugates), CAR-T cell therapies and immunotherapies have created a need for field-level scientific expertise that commercial teams cannot provide. GLP-1 compounds have also opened roles in the metabolic segment, with companies now recruiting in a therapeutic area that was historically a small employer for MSL profiles. Biosimilars generate a distinct type of MSL activity, focused on extrapolation and interchangeability discussions with hospital prescribers.

Digitalisation has concretely changed the role. Video-based exchanges with KOLs (e-MSL) now represent a significant share of activity alongside face-to-face visits. Companies expect candidates to be proficient with CRM tools (Veeva) and KOL engagement tracking platforms. The hybrid MSL, equally effective in digital and in-person settings, is now the standard profile.

2. MSL responsibilities and key activities

2.1 Scientific dissemination to Key Opinion Leaders (KOLs)

This is the core of the role. The MSL arranges one-to-one meetings with clinical investigators, heads of department at university hospitals, and specialist hospital pharmacists. These exchanges focus on the product’s clinical data, recent publications in the therapeutic area, and results from ongoing trials. They are strictly non-promotional: no commercial incentive, no prescribing objective.

The MSL also attends advisory boards, scientific meetings and national and international congresses (ESMO, ASCO, ESC, ASH, EHA depending on the therapeutic area) to develop and maintain their KOL network and stay current with the latest evidence.

2.2 Support for clinical research and pharmacovigilance

The MSL identifies investigators for company-sponsored clinical trials. They also support studies initiated by investigators themselves (IIS: Investigator-Initiated Studies), covering feasibility assessment, submission to the medical committee and ongoing project follow-up. On the pharmacovigilance side, they collect field signals on product tolerability and real-world use and report them to the appropriate internal teams.

2.3 Contribution to Market Access

In reimbursement and early access dossiers, the MSL provides Market Access teams with real-world data, insights on prescribing practices and literature reviews on clinical outcomes (HEOR, Health Economics and Outcomes Research). Their field positioning gives them access to information that HQ teams do not collect directly. Several companies have formalised this contribution with specific HEOR objectives assigned to MSLs, particularly in submissions to national health technology assessment bodies.

2.4 Scientific monitoring and medical intelligence

The MSL monitors publications in their specialty, congress communications and regulatory developments. They produce internal summaries for medical and marketing teams. Some companies assign them a competitive intelligence remit covering data generated by rival products, or data from markets where the product is already commercialised.

3. MSL competencies and candidate profile

3.1 Scientific hard skills

Critical appraisal of clinical studies is non-negotiable. An MSL needs to be able to deconstruct a phase III trial in front of a demanding investigator: discuss the methodology, identify the limitations, and contextualise the results within the broader literature. Solid foundations in biostatistics, Good Clinical Practice (GCP) and pharmacology are expected as a baseline.

Scientific English proficiency is required in virtually all MSL positions: publications, internal communications and interactions within international companies are conducted in English.

3.2 Soft skills and relational intelligence

The MSL has no hierarchical authority over their contacts: everything depends on scientific credibility and the quality of the relationship. That credibility is built over time, not in a single visit. Recruiters look for candidates who can adapt their communication to the audience (department head versus resident, oncologist versus hospital pharmacist) without oversimplifying the science.

Independent territory management is a basic requirement. The MSL handles their KOL portfolio autonomously, with interaction objectives rather than prescribing targets. Knowing how to prioritise contacts, manage declined meeting requests and maintain consistent engagement without commercial pressure is a skill in itself.

3.3 Working environment and organisation

The MSL role is inherently field-based. Depending on the size of the assigned territory, travel accounts for two to four days per week. A company car is provided and MSLs typically work from home when not in the field. CRM tools (Veeva, Salesforce Health) structure contact management, interaction tracking and visit reporting.

4. Training to become a Medical Science Liaison

4.1 Required academic background

A doctorate-level qualification is the norm across MSL job postings. Recruiters primarily accept the following:

• PharmD (Doctor of Pharmacy): the most frequently recruited profile in France across all therapeutic areas
• MD (Doctor of Medicine): particularly sought in oncology, neurology and cardiology, where a medical degree reinforces credibility with KOLs
• PhD in life sciences (biology, biochemistry, pharmacology, immunology): mainly for biotech positions or highly specialised areas such as rare diseases or gene therapy

Master’s-level profiles exist for HQ-based Medical Advisor roles or for juniors with strong CRO experience. For a field MSL position, a doctorate remains the standard requirement.

4.2 The MSL University Diploma: the specialist training programme

The MSL University Diploma (DU Medical Science Liaison) from Université Paris Cité is the reference training programme in France for professionals entering the field or looking to specialise. It is designed for healthcare professionals wishing to transition into the MSL role from another medical function. The curriculum covers scientific exchange frameworks, the regulatory and compliance framework, KOL presentation techniques and IIS study management.

Additional certifications are available through the MSL Society and MAPS (Medical Affairs Professional Society), primarily in English, which carry weight in international companies.

4.3 How to become an MSL: the typical career path

There is no single route into the role. The most common transition paths observed by CDG Conseil consultants in MSL recruitment are:

• From clinical research: CRO Project Manager, CRA or hospital research coordinator with 3 to 5 years of clinical trial experience
• From hospital pharmacy: university hospital or institutional pharmacist transitioning to industry, bringing prescriber expertise and knowledge of hospital procurement channels
• From clinical medicine: general practitioner or specialist who has practised for several years before joining industry
• From HQ medical affairs: Medical Advisor or Regulatory Affairs professional seeking a field role with direct KOL contact

For a junior candidate, the DU MSL shortens the time needed to convince recruiters: it demonstrates familiarity with the role’s standards and expectations before the first day on the job.

5. Medical Science Liaison salary in France

5.1 Salary ranges by experience level

The figures below are drawn from CDG Conseil’s recruitment activity on MSL, RMR and Medical Advisor positions over the 2023–2025 period.

5.2 Factors that influence compensation

Therapeutic area has a strong impact on salary. Oncology positions (ADC, CAR-T, targeted therapies) and rare neurology consistently sit above the average. A junior MSL in oncology at a large American laboratory can exceed €65,000 in their first years in the role.

Geography has less influence on the fixed component than one might expect. The field MSL is not based in Paris: they are assigned to a territory (North, West, South-East). Company car and travel expenses are covered in all cases, regardless of where the MSL is based.

A full MSL package typically includes a company car, laptop, professional mobile phone, congress attendance expenses, national scientific event participation, and in some cases profit-sharing depending on the company’s legal structure.

5.3 Junior MSL salary: what candidates often underestimate

Many junior candidates focus on the base salary and undervalue the total package. A junior MSL on €52,000 fixed with a company car (lease value €450–600/month), covered congress costs and a top-tier health insurance scheme represents a total compensation significantly above the advertised figure. This is a point worth negotiating explicitly during the recruitment process.

6. Career development prospects

6.1 Internal progression within Medical Affairs

The natural progression runs through Senior MSL, then MSL Manager (responsible for a regional team of 5 to 15 MSLs depending on the company’s size), and on to Head of MSL or Medical Affairs Director. Firms like CDG Conseil regularly place Senior MSL profiles in medical affairs management roles, taking on responsibility for national or EMEA-wide KOL strategy.

6.2 Pathways into other functions

MSL experience opens doors beyond the field. Market Access is the most common lateral move: KOL insights gathered in the field feed directly into HTA submissions and payer negotiations. Several experienced MSLs move into Clinical Development as phase III or IV trial managers, drawing on their investigator networks.

Less conventional transitions also exist: Medical Education, medical operations leadership, or General Manager roles in mid-size subsidiaries, particularly within biotechs that value profiles combining strong scientific depth with relationship-building skills.

7. Recruiting an MSL or finding a position: CDG Conseil

7.1 Our expertise in MSL and Medical Affairs recruitment

CDG Conseil has been recruiting MSL, RMR and Medical Advisor profiles for over 20 years, for pharmaceutical laboratories, biotech companies and medical device firms. Our consultants are specialised by therapeutic area and understand what recruiters actually look for: doctoral-level qualification, initial IIS study experience, Veeva proficiency, and an established KOL network in the specialty.

As a member of the INRALS network (International Network of Recruitment Agencies in Life Sciences), CDG Conseil has sourcing reach that extends well beyond France. MSL candidates open to mobility from Germany, the UK, Belgium or Spain are regularly matched with companies operating in France or across an EMEA territory. For rare-profile positions (ADC expertise, gene therapy, rare diseases), this international network makes a real difference.

Our teams are based in Paris, Lyon and Brussels.

7.2 Available MSL job openings

Our MSL and Medical Affairs job postings are updated on a continuous basis. Candidates: browse our careers page or submit a speculative application; our consultants will get back to you within 48 working hours. Companies: bring us your MSL recruitment challenges, including rare profiles and urgent mandates.