International Medical Science Liaison Day | March 27
(Last Updated On: March 27, 2023)


International Medical Science Liaison Day, on March 27th, recognizes the vital role Medical Science Liaisons (MSL) play in the success of a company.


Since being first established by Upjohn Pharmaceuticals in 1967, MSLs have become increasingly important to the companies’ success that employs them. According to the MSL Society website, “Today, MSLs are scientific experts to internal colleagues at their companies; they help to ensure that the drug or product they support are utilized effectively by physicians, and serve as scientific peers and resources within the medical community.”


  • Show pride in your profession.
  • Share The International MSL Day logo on social media.
  • Take a photo where you are showing off your MSL pride!
  • Share your story of how you became an MSL.
  • Share why you love the MSL career.
  • To learn more about how to get involved, visit:
  • Give a shout-out to an MSL you know who is dedicated to the job. Use #InternationalMSLDay to share on social media.


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In 2020, The Medical Science Liaison Society established International Medical Science Liaison Day to raise awareness of the importance of the MSL role in pharmaceutical, biotechnology, medical device, and other companies that employ them. Their role ultimately improves patients’ lives.

Dr. Samuel Dyer, CEO of the MSL Society, commented: “Establishing International Medical Science Liaison Day is a way to celebrate our profession and demonstrate our commitment to the profession on a global scale. MSLs make important contributions in helping to advance science and medicine, which ultimately improves the quality of life for patients dealing with various diseases and conditions. Having an official day dedicated to MSLs is a unique way to recognize the profession and raise awareness of the importance of the global MSL profession.”

Paul Q. Ward, National MSL Lead, AstraZeneca, commented, “I’m very excited to have March 27th mark the first-ever International MSL Day and have this day set aside to recognize MSLs around the world for the incredible work they do. MSLs play an important part of educating prescribers on the disease state, safety, efficacy, and appropriate use of medications that ultimately lead to improvements in the care of patients. More and more, MSLs are being turned to for their scientific and clinical skills as a trusted source of information by health care providers. I am proud to be a part of the MSL Society and the work it does to grow, develop and recognize the contributions of MSLs around the world for all they do. Congratulations and thank you MSLs!”

The Registrar at National Day Calendar® proclaimed International Medical Science Liaison Day to be observed on March 27th, annually.

About The Medical Science Liaison Society

The Medical Science Liaison Society is the only 501(c)(3) Non-Profit Organization exclusively dedicated to advancing the global MSL profession. Serving as a voice for the profession, the organization builds further awareness of the important contributions that MSLs make in advancing science, which ultimately improves the quality of life for patients dealing with various diseases and conditions. Additionally, The Medical Science Liaison Society provides numerous resources for those interested in the MSL career, as well as professional growth and development opportunities for current MSL Managers and individual MSLs.

The MSL Career has exploded in growth over the last several years, and the MSL has become vital to the success of pharmaceutical companies. As the MSL role continues to grow and evolve, The Medical Science Liaison Society will provide resources to members to increase their industry knowledge, connect them to the global MSL community, and give them the tools and resources they need to advance in their careers.

Medical Science Liaison FAQ

Q. How much education is required to become a Medical Science Liaison (MSL)?
A. An MSL requires a minimum of a master’s degree in a medical or scientific field, but most positions require a PhD or an MD.

Q. What are the job prospects for an MSL?
A. The MSL career is a growing field worldwide.

Q. Where do MSLs work?
A. MSLs work with a variety of healthcare and technology organizations including pharmaceutical and biotechnology companies, and other healthcare-related settings.

March 27th Celebrated History


Branch managers of the American Bell Telephone Company in Boston, MA made the first long-distance telephone call when they called the branch managers in New York.


The Coca-Cola Company officially submits Coke as a registered trademark.


The MGM musical Singin’ in the Rain premieres in New York City. Gene Kelly and Stanley Donen directed the romantic comedy. Gene Kelly plays opposite Debbie Reynolds in a film about a production company and cast transitioning into the world of talkies.


NASA launches Mariner 7 on its mission to study the atmosphere and surface of Mars. Five days earlier, Mariner 6 launched with the same mission. However,  Mariner 7 would successfully return usable data five months later.

March 27th Celebrated Birthdays

Patty Hill – 1868

The American educator composed songs for children with her sister Mildred Hill. They would publish Song Stories for Kindergarten. The melody for one composition, “Good Morning to All” gained worldwide fame. We know it by the name “Happy Birthday to You.” In 2013, the song became the focus of a class-action lawsuit when the copyright came under scrutiny.

In 1996, the Songwriters Hall of Fame elected to induct both Patty and Mildred Hill posthumously into the Hall of Fame.

Effa Manley – 1897

In 1935, Effa Manley became part-owner of the Negro League team the Brooklyn Eagles.  And she grew it into a successful business. Effa was also known for her fierce stance on equal rights, often hosting Anti-lynching Days at games. Later known as the Newark Eagles they would win the 1946 Negro League World Series.

Quentin Tarantino – 1963

The award-winning director made his debut in 1992 with Reservoir Dogs. Two years later, Tarantino earned his first Oscar with the film Pulp Fiction.

Mariah Carey – 1970

The award-winning singer-songwriter is known for her broad vocal range. Carey rose to stardom in the 1990s with her self-titled album.

Notable Mentions

Wilhelm Rontgen – 1845
Sato Eisaku – 1901
Nathan Fillion – 1971
Dustin Byfuglien – 1985

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