Seqirus UK Limited Posted September 17, 2026

Principal Clinical Scientist

Maidenhead, United Kingdom Full time
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Seqirus UK Limited 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

Principal Clinical Scientist

(Senior Clinical Scientist level also considered)

The Role

We're looking for a clinical scientist, someone who has been the scientific lead for clinical studies before, from protocol development to start-up (development of critical study documents) through to study execution, data analysis and interpretation and close-out with a clinical study report. Having prepared regulatory submissions of study results is a pre. You'll work in close partnership with the clinical operations team and CROs under the team's full-outsource operating model, managing that day-to-day relationship rather than delivering trial activity in-house. It's one of two newly approved roles, created ahead of anticipated demand rather than to backfill a departure, which means there's genuine room to help shape how the team works rather than simply joining an existing structure.

Hybrid based (3 days a week onsite) in Maidenhead (UK), Melbourne (Aus) or Zurich (CH)

Why It Matters

A clinical study is only as good as the people running it. A weak protocol, poorly managed start-up, or a fumbled relationship with the CRO delivering the trial can cost a program months, sometimes far more, and that delay sits between a therapy and the patients waiting on it. This role exists because CSL is adding capacity to get that execution right: someone who can lead all scientific needs of a study properly, and co-own the end to end alongside clinical operations, is what actually moves a clinical development plan forward. It's not a supporting or administrative function, it's the core that determines whether the science translates into a trial that runs cleanly and data that holds up.

What You'll Be Responsible For

You'll take ownership of clinical studies end-to-end, acting as the scientific and operational anchor between the program team and outsourced delivery partners.

Lead all scientific elements of clinical studies from protocol development through study execution to a final clinical study report

Write and/or take responsibility for study protocols, clinical study reports and other critical study documents

Manage, alongside the clinical operations lead, day-to-day working relationships with CROs under a full-outsource operating model

Collaborate closely with the cross-functional study teams, this is a collaborative role, not an isolated one one

Contribute to the scientific interpretation of clinical data and supporting documentation

Build working relationships across the wider team, including colleagues based in the US and Australia

Experience Required

Demonstrated, hands-on experience with clinical studies (protocol development, execution, close-out), not solely oversight or academic exposure

Experience writing clinical study protocols and clinical study reports directly

Experience working within a full-outsource / CRO-dependent operating model

A collaborative, cross-functional working style, comfortable building relationships rather than working independently

About CSL Seqirus

CSL Seqirus is part of CSL. As one of the largest influenza vaccine providers in the world, CSL Seqirus is a major contributor to the prevention of influenza globally and a transcontinental partner in pandemic preparedness. With state-of-the-art production facilities in the U.S., the U.K. and Australia, CSL Seqirus utilizes egg, cell and adjuvant technologies to offer a broad portfolio of differentiated influenza vaccines in more than 20 countries around the world.

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 .

Watch our ‘On the Front Line’ video to learn more about CSL Seqirus

Job details

Seniority
Principal
Function
Clinical Development
Therapeutic area
Not listed
Location
Maidenhead, United Kingdom
Employment type
Full time

How this role compares

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

We currently track 421 comparable Principal Clinical Development roles across 63 biopharma companies.

421Comparable roles tracked
397Currently active
63Companies hiring similar roles
33Countries represented

Salary context

181 of 421 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
Peer group range $0 – $392,100 (median $251,050)

Where these roles are based

Top locations among the 421 comparable roles

United States280
India31
United Kingdom26
China11
Spain7
Switzerland6

+ 27 more countries

Seniority mix

421 of 421 peers have a known seniority level

Director240
Senior150
Principal31

Therapeutic area mix

92 of 421 peers have a known therapeutic area; the rest are genuinely unlabeled, not hidden

Oncology43
Immunology18
Neuroscience15
Respiratory6
Cardiovascular / CVRM5
Dermatology & Aesthetics3
Ophthalmology1
Rare Disease1

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
Mylan Pharma UK Limited Sandwich, United Kingdom Principal
Same function Same seniority Same country
60%similar
IQVIA London, United Kingdom Principal
Same function Same seniority Same country
60%similar
Seqirus UK Limited Maidenhead, United Kingdom Principal
Same function Same seniority Same country
60%similar
BMS Business Services Ltd Uxbridge, United Kingdom Principal
Same function Same seniority Same country
50%similar
Astellas Pharma Addlestone, United Kingdom Director
Same function Adjacent seniority Same country
50%similar
BMS Business Services Ltd Uxbridge, United Kingdom Director
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.

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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 Statistician
Mylan Pharma UK Limited · Sandwich, United Kingdom · Principal
Function Therapeutic area Seniority Country
60%
Principal Statistical Programmer
BMS Business Services Ltd · Uxbridge, United Kingdom · Principal
Function Therapeutic area Seniority Country
50%
Director, Clinical Operations
Neurocrine UK Limited Diurnal · UK London, United Kingdom · Director
Function Therapeutic area Adjacent seniority Country
50%
Global Development Medical Director, Late Respiratory and Immunology Clinical Development
AstraZeneca · Cambridge, Cambridgeshire, United Kingdom · 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.