CSL Behring L.L.C. Posted September 9, 2026

Principal Medical Writer

King of Prussia, United States Full time
Medical Affairs Principal
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CSL Behring L.L.C. is the source of truth for this posting and owns the application process. We surface normalized context and market comparison you won't find on the original listing.

About this opportunity

The Principal Medical Writer is a key leadership position responsible for determining and driving the medical writing strategy for one or more Programs within Clinical Development.

The incumbent is accountable for the efficient preparation of high quality, strategically aligned medical writing deliverables that support the clinical development, clinical safety and regulatory requirements of a clinical program. He or she is also responsible for the messaging strategy across a program of work, for the provision of strategic input into the development of clinical development plans and submission plans, and for analyzing proposed plans, programs, individual studies and related documents for their ability to deliver the information required by the target audience (ie, regulatory authority) in a compelling fashion with accuracy and consistency. This role has global responsibilities, participation in global teams and interaction with regulatory agencies in multiple regions.

Main Responsibilities & Accountabilities:

Leads the Medical Writing contributions to assigned clinical Programs

Drives and develops the messaging strategy for the assigned Program(s) to ensure effective   communication

Accountable for medical writing deliverable quality and ensures adherence to departmental   procedures / practices, and industry / international standards

Minimum Qualifications   and Experience :

Bachelor’s degree in   s cience   related discipline   with 5+ years of medical writing experience within the biopharmaceutical industry or contract research organization

Post-graduate qualifications desired (PhD or MD preferred)

Competencies :

Comprehensive understanding of medical writing for clinical development, including the documents required at each stage and their associated regulatory requirements

Comprehensive understanding of medical writing processes   and   standards

Excellent written, verbal and presentation skills

Demonstrated track record in cross-functional, multicultural and international clinical trial teams .

Proven effective verbal, written and presentation skills .

Mastery of the English language, with a comprehensive understanding of English grammar and punctuation .

Expert MS Office skills with a special focus on word processing, tables, spreadsheets, presentations, graphics and templates

Prior experience with submissions in Common Technical Document (CTD) format.

Proven ability to work effectively both independently or in a team settin g.

Proven effective   influencing skills, able to lead without formal authority

Excellent organizational and time management skills with demonstrated ability to manage several projects simultaneously .

Ability to   analyze   critically and synthesize complex scientific information from a   range of scientific disciplines and clinical therapeutic areas .

Successful track record of leading complex clinical / regulatory writing projects.

E xcellent understanding of ICH-GCP .

Detail-oriented .

About CSL Behring

CSL Behring is a global biotherapeutics leader driven by our promise to save lives. Focused on serving patients’ needs by using the latest technologies, we discover, develop and deliver innovative therapies for people living with conditions in the immunology, hematology, cardiovascular and metabolic, respiratory, and transplant therapeutic areas. We use three strategic scientific platforms of plasma fractionation, recombinant protein technology, and cell and gene therapy to support continued innovation and continually refine ways in which products can address unmet medical needs and help patients lead full lives.

CSL Behring operates one of the world’s largest plasma collection networks, CSL Plasma. Our parent company, CSL, headquartered in Melbourne, Australia, employs 32,000 people, and delivers its lifesaving therapies to people in more than 100 countries.

To learn more about CSL, CSL Behring, CSL Seqirus and CSL Vifor  visit https://www.csl.com/ and CSL Plasma at https://www.cslplasma.com/ .

 

Our Benefits

For more information on CSL benefits visit How CSL Supports Your Well-being | CSL .

You Belong at CSL

At CSL, Inclusion and Belonging is at the core of our mission and who we are. It fuels our innovation day in and day out. By celebrating our differences and creating a culture of curiosity and empathy, we are able to better understand and connect with our patients and donors, foster strong relationships with our stakeholders, and sustain a diverse workforce that will move our company and industry into the future.

To learn more about inclusion and belonging visit https://www.csl.com/careers/inclusion-and-belonging

 

Equal Opportunity Employer

CSL is an Equal Opportunity Employer. If you are an individual with a disability and need a reasonable accommodation for any part of the application process, please visit https://www.csl.com/accessibility-statement .

Job details

Seniority
Principal
Function
Medical Affairs
Therapeutic area
Not listed
Location
King of Prussia, United States
Employment type
Full time

How this role compares

Computed from every other active Medical Affairs role in our database, not just this employer's listings.

We currently track 401 comparable Principal Medical Affairs roles across 74 biopharma companies.

401Comparable roles tracked
362Currently active
74Companies hiring similar roles
33Countries represented

Salary context

170 of 401 peers report a salary range (USD, annualized)

Peers share this role's job function and a matching or adjacent seniority level -- not necessarily the same therapeutic area or country.

This roleSubject Not listed on this posting
Lowest disclosed · Senior Clinical Research Associate I · Pfizer $82,700/yr – $137,900/yr
Highest disclosed · Sr Medical Director (Heme Oncology) (Boston, US) · Servier $298/hr – $350/hr (≈ $619,840–$728,000/yr)
Peer group range $110,300 – $673,920 (median $233,850)

Where these roles are based

Top locations among the 401 comparable roles

United States256
United Kingdom25
India14
Japan12
Germany11
Taiwan11

+ 27 more countries

Seniority mix

401 of 401 peers have a known seniority level

Director226
Senior169
Principal6

Therapeutic area mix

155 of 401 peers have a known therapeutic area; the rest are genuinely unlabeled, not hidden

Oncology65
Neuroscience16
Dermatology & Aesthetics14
Rare Disease13
Immunology12
Cardiovascular / CVRM10
Respiratory9
Vaccines & Infectious Disease9
Gastroenterology5
Ophthalmology2

Similar opportunities

The closest matches from our peer group, ranked by how similar they are, not how well you'd qualify for them -- treat this as market context, not a guaranteed shortlist; a weak match is labeled as one below.

60%similar
ViiV Healthcare UK Limited Durham Blackwell Street, United States Principal
Same function Same seniority Same country
60%similar
Merck KGaA Billerica, Massachusetts, United States Principal
Same function Same seniority Same country
60%similar
AbbVie Chicago, IL Principal
Same function Same seniority Same country
50%similar
AbbVie North Chicago, IL Director
Same function Adjacent seniority Same country
50%similar
AbbVie Director
Same function Adjacent seniority Same country

Open in 3 locations

Mettawa, United StatesFlorham Park, United StatesSan Francisco, United States
50%similar
AbbVie Boston, MA Senior
Same function Adjacent seniority Same country

Notify me about similar jobs

Get an email when we spot other openings like this one – same job function, comparable seniority, roles you'd actually want to see.

How we calculate "similar"

No black box, no LLM guesswork: a deterministic score built from four normalized attributes. Here's this role's own peer group at different match levels, so you can see the mechanism, not just the result.

Every comparison starts from the same 100-point budget: 25 for working in the same function, 40 for the same therapeutic area, 20 for the same or adjacent seniority, 15 for the same country. A dimension we can't confirm on both sides contributes nothing, never a guess, never a free pass.

60%
Principal Medical Writer
ViiV Healthcare UK Limited · Durham Blackwell Street, United States · Principal
Function Therapeutic area Seniority Country
50%
Associate Medical Director (Physician Development Program - Hematology)
AbbVie · North Chicago, IL · Director
Function Therapeutic area Adjacent seniority Country
50%
Scientific Director / Senior Medical Director, Multiple Myeloma (International Medical Affairs)
AbbVie · San Francisco, CA · Director
Function Therapeutic area Adjacent seniority Country
50%
Scientific / Medical Director, Global Hematology Pipeline, Medical Affairs
AbbVie · Florham Park, NJ · Director
Function Therapeutic area Adjacent seniority Country
Unmatched or unknown dimensions score exactly the same: 0 points, never a partial guess. A role we know almost nothing about beyond its function bottoms out at 25%; it never inflates to 100% just because there's little to compare against. Seniority uses a defined ladder (Associate → Manager → Associate Director → Senior → Principal → Director → Senior Director → Executive/VP) so "Director" and "Senior Director" count as adjacent, but "Director" and "Executive/VP" do not.