Senior Medical Science Liaison (Sr. MSL) / Principal Medical Science Liaison (Principal MSL) Oncology - PA

Eisai, Inc
Harrisburg, PA
At Eisai, satisfying unmet medical needs and increasing the benefits healthcare provides to patients, their families, and caregivers is Eisai's human health care (hhc) mission. We're a growing pharmaceutical company that is breaking through in neurology and oncology, with a strong emphasis on research and development. Our history includes the development of many innovative medicines, notably the discovery of the world's most widely-used treatment for Alzheimer's disease. As we continue to expand, we are seeking highly-motivated individuals who want to work in a fast-paced environment and make a difference. If this is your profile, we want to hear from you.

Summary:

The MSL (Senior Medical Science Liaison or Principal Medical Science Liaison) is a field-facing representative of US Medical Affairs with a primary responsibility of engaging in the exchange of scientific data and other medical and/or scientific information with external customers (Health Care Providers, researchers, professional organization leadership, and population-based decision makers), including top echelon healthcare leadership, in the areas of Eisai's interest. The person in this position will demonstrate a thorough understanding of the customer's needs, issues and priorities as they relate to Eisai's strategic business plan and is able to 'connect the dots' and see the 'big picture' as it relates to the business.

The Senior/ Principal MSL brings relevant insights from the field on research developments, treatment landscape and new concepts in medical treatment. The incumbent will also identify patterns and trends in KOL mindset and practices across geographies based on insights. The Senior/ Principal MSL will assume a leadership role by coaching and mentoring other MSL s and by assuming responsibility for special projects as they arise.

The impact that a Sr MSL / Principal MSL will have on the organization includes the following:
  • Communicating key information about Eisai, the company and it's hhc mission, and key scientific/clinical information about Eisai's products, demonstrating a pattern of good judgment, emotional intelligence, business acumen and therapeutic knowledge.
  • Effectively communicating relevant and fair balanced scientific and clinical information on Eisai products, seeking feedback from decision makers and health care practitioners to ensure patients' needs are being met; leveraging a variety of communication channels to serve as a conduit between Eisai and the medical community in order to share ideas about future collaborative research with Eisai products.
  • Bringing relevant insights from the field on research developments, treatment landscape and new concepts in medical treatment.
  • Providing corporate value through demonstrated leadership and participation in strategic thinking
Responsibilities:

Senior Medical Science Liaison Responsibilities:

• Act as the primary clinical/scientific resource to HCPs in the territory for information on disease state and Eisai's product(s) to ensure awareness and understanding.

• Lead assigned professional congresses in accordance with MSL plan by leading congress coverage efforts, including coordination of all MSL activities, as required.

• Present clinical, scientific and economic data on Eisai's products and relevant therapeutic areas to population-based decision-makers.

• Lead projects as appropriate.

• Establish, foster, cultivate and maintain peer relationships with KOLs in the therapeutic areas in which Eisai has current and future interests.

• Serve as primary contact to external investigators who submit IISs to provide recommendations for site selection and scientific expertise to Investigators involved in company-sponsored post-marketing studies.

• Provide mentoring, guidance and training to new hires/ less experienced colleagues; assist with supervision/performance evaluation; assume responsibility for special projects.

• Provide inputs to strategic planning, work processes and escalate any deviations.

Principal Medical Science Liaison Responsibilities:
  • Build advocacy leading to a strong franchise and serve as a conduit for accurate and updated clinical, scientific and medical information between KOLs, other investigators and the company's Medical Affairs and R&D groups.
  • Propose strategic solutions to competitive and clinical practice issues that may be uncovered as part of a field insights observation and analysis.
  • Actively participate in executing Eisai's strategy at scientific meetings, coordinate MSL meeting/booth coverage, and proactively facilitate KOL interactions with Eisai stakeholders.
  • Manage complex projects in parallel, often at a National scope by executing activities within a given area of expertise and providing lateral/indirect leadership and strategic direction to MSL s.
  • Provide field perspective and insight into developing new resources and strategies through industry and scientific acumen.
  • Provide inputs to overall development of strategy, budget and resources including talent pool and address deviations.
  • Provide guidance and training to new hires/ less experienced colleagues.
Qualifications:
  • Requires an advanced, terminal Doctorate level (D-level) degree in medical or health sciences (e.g. MD, PhD, PharmD, DPH, EdD).
  • For Sr. MSL ,1.5-3+ years of experience in the pharma/biotech industry; previous experience as an MSL preferably in Oncology OR a combination of equivalent education and experience.
  • For Principal MSL , 8+ years of overall experience in Oncology with relevant combination industry/ clinical/ research/ academia; at least 5 years as an MSL in Oncology OR a combination of equivalent education and experience.

  • Experience teaching, coaching, and mentoring new hires and/or less experienced MSL s.
  • Knowledge of disease state management in oncology therapeutic areas along with strong broad-based scientific and pharmaceutical knowledge.
  • Presentation skills, teaching skills, and confidence in discussing drug information/ disease state management.
  • Prior experience in clinical research, drug development and/or clinical pharmacy and a basic understanding of commercial operations, including marketing and sales strategies.

  • Proven performance in earlier role.

  • Established relationships with KOLs in Oncology/Hematology preferred.

  • Possesses an understanding of the pharmaceutical corporate environment and appreciation for commercial operations, including marketing and sales strategies.

  • For Principal MSL , must have prior experience designing strategic solutions to competitive and clinical practice issues.

  • Capable of engaging in frequent business travel (approximately 60% of time), including air travel, ability to travel overnight and occasionally on weekends.

  • Domestic and international travel may include spending time at cancer trial sites/institutions, conference center, offices and hotels.

  • Possesses and maintains a valid driver's license.

  • This is a field-based position. The employee is required to set up a home-based office.
Salary range for Sr. MSL is $160,100.00 - $210,100 USD Annual

Salary range for Principal MSL is $182,200.00 - $239,085 Annual

#LI-MI1

As a condition of employment and an essential function of this field-based position, applicants must be able to engage in person with HCPs and other third parties at their offices, institutions and other appropriate locations on a regular basis. In order to gain in-person access, applicants selected for the position may be required to complete third parties' credentialing and/or entry requirements, which often include an attestation to and/or providing proof of having received certain vaccinations, including but not limited to the COVID-19 or flu vaccines. To the extent you are unable to meet certain requirements for qualifying medical (including pregnancy-related) or religious reasons, applicants must request a reasonable accommodation by contacting the Human Resources Department.Skills:Communication & Cross-functional Influence, Critical Thinking & Agility, Healthcare Environment Dynamics, KOL/ HCP Engagement, Medical Data and Insights, Mentoring, Resource Planning & Management, Territory Management (MSL)

Eisai Salary Transparency Language:
The base salary range for the Senior Medical Science Liaison (Sr. MSL) / Principal Medical Science Liaison (Principal MSL) Oncology - PA is from :160,100-210,100

Under current guidelines, this position is eligible to participate in : Eisai Inc. Annual Incentive Plan & Eisai Inc. Long Term Incentive Plan.

Final pay determinations will depend on various factors including but not limited to experience level, education, knowledge, and skills.

Employees are eligible to participate in Company employee benefit programs. For additional information on Company employee benefits programs, visit .

Certain other benefits may be available for this position, please discuss any questions with your recruiter.

Eisai is an equal opportunity employer and as such, is committed in policy and in practice to recruit, hire, train, and promote in all job qualifications without regard to race, color, religion, gender, age, national origin, citizenship status, marital status, sexual orientation, gender identity, disability or veteran status. Similarly, considering the need for reasonable accommodations, Eisai prohibits discrimination against persons because of disability, including disabled veterans.

Eisai Inc. participates in E-Verify. E-Verify is an Internet based system operated by the Department of Homeland Security in partnership with the Social Security Administration that allows participating employers to electronically verify the employment eligibility of all new hires in the United States. Please click on the following link for more information:

Right To Work

E-Verify Participation
Posted 2025-08-10

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