Analytical Scientist – Mass Spectrometry

Join GSK’s Extended Characterization Europe team as an Analytical Scientist, supporting the analytical development and characterisation of biopharmaceutical molecules. This predominantly laboratory-based role will use LC-MS and LC-MS/MS to generate scientific understanding that supports the development and control of new drug substances and products.

You will work independently and collaboratively across Discovery and CMC Development teams, combining strong scientific judgement, data analysis, communication and organisation to help deliver a novel pipeline of medicines to patients.

We create a place where people can grow, be their best, be safe, and feel welcome, valued and included. We offer a competitive salary, an annual bonus based on company performance, healthcare and wellbeing programmes, pension plan membership, and shares and savings programme.

We embrace modern work practises; our Performance with Choice programme offers a hybrid working model, empowering you to find the optimal balance between remote and in-office work.

Discover more about our company wide benefits and life at GSK on our webpage Life at GSK | GSK

In this role you will

• Plan, execute and interpret LC-MS and LC-MS/MS experiments for the characterisation of biopharmaceutical molecules.
• Develop, optimise and troubleshoot analytical methods, experiments and instrumentation.
• Investigate molecular structure, product quality attributes and post-translational modifications to support the identification and assessment of critical quality attributes.
• Support early-phase programmes through forced degradation studies, comparability assessments, process understanding and technical transfer.
• Critically evaluate complex analytical datasets, draw scientifically robust conclusions and recommend appropriate next steps.
• Communicate findings clearly, prepare high-quality technical documentation and maintain high standards of data integrity, quality and laboratory safety.

Why you?

Basic Qualifications & Skills:

We are looking for professionals with these required skills to achieve our goals:

• PhD, MSc or equivalent relevant experience in Analytical Chemistry, Chemistry, Biochemistry, Pharmaceutical Sciences or a related discipline.
• Experience of LC-MS or LC-MS/MS method development and execution for biopharmaceuticals in a pharmaceutical or biotechnology setting.
• Good understanding of protein biochemistry, post-translational modifications and the relationship between molecular structure, function and product quality attributes.
• Ability to independently plan and execute analytical experiments and troubleshoot scientific and technical challenges.
• Experience working in matrix teams and delivering time-bound, multi-project work packages with strong organisation and prioritisation.
• Strong data interpretation, written and verbal communication skills, with a commitment to data integrity, scientific standards, safe laboratory practice and effective documentation.

Preferred Qualifications & Skills:

Please note the following skills are not necessary, just preferred, if you do not have them, please still apply:

• Knowledge of protein glycosylation and analytical workflows for N-linked glycan analysis.
• Understanding of antibody sequence and structure-function relationships and critical quality attributes.
• Experience with liquid-handling automation systems.
• Experience with mass spectrometry data-analysis software such as Protein Metrics or equivalent platforms.
• Experience handling large datasets and conducting statistical analysis using software such as JMP or SIMCA.
• Understanding of biopharmaceutical manufacturing processes and confidence working across teams with shared laboratory instrumentation.

Location: For candidates seeking to be located at our Stevenage site, this role will temporarily be based at Stevenage. However, the Company plans to relocate its offices to Ware. The location of this role will therefore subsequently change to Ware in accordance with timelines to be set by the Company. The relocation is currently proposed to take effect by early 2029.

Closing Date for Applications – 23rd November 2026 (COB)

Please take a copy of the Job Description, as this will not be available post closure of the advert.

When applying for this role, please use the ‘cover letter’ of the online application or your CV to describe how you meet the competencies for this role, as outlined in the job requirements above. The information that you have provided in your cover letter and CV will be used to assess your application.

At GSK, we have bold ambitions for patients, aiming to positively impact the health of 2.5 billion people by the end of the decade. Our R&D focuses on discovering and delivering vaccines and medicines, combining our understanding of the immune system with cutting-edge technology to transform people’s lives. GSK fosters a culture ambitious for patients, accountable for impact, and committed to doing the right thing, making sure that we focus our efforts on accelerating significant assets that meet patients’ needs and have the highest probability of success. We’re uniting science, technology, and talent to get ahead of disease together.

Find out more:

Our approach to R&D.   

Skills

Why GSK?

Uniting science, technology and talent to get ahead of disease together.

GSK is a global biopharma company with a purpose to unite science, technology and talent to get ahead of disease together. We aim to positively impact the health of 2.5 billion people by the end of the decade, as a successful, growing company where people can thrive. We get ahead of disease by preventing and treating it with innovation in specialty medicines and vaccines. We focus on four therapeutic areas: respiratory, immunology and inflammation; oncology; HIV; and infectious diseases – to impact health at scale.

People and patients around the world count on the medicines and vaccines we make, so we’re committed to creating an environment where our people can thrive and focus on what matters most. Our culture of being ambitious for patients, accountable for impact and doing the right thing is the foundation for how, together, we deliver for patients, shareholders and our people.

GSK is an Equal Opportunity Employer. This ensures that all qualified applicants will receive equal consideration for employment without regard to race, color, religion, sex (including pregnancy, gender identity, and sexual orientation), parental status, national origin, age, disability, genetic information (including family medical history), military service or any basis prohibited under federal, state or local law.

We believe in an agile working culture for all our roles. If flexibility is important to you, we encourage you to explore with our hiring team what the opportunities are.

Should you require any adjustments to our process to assist you in demonstrating your strengths and capabilities contact us at UKRecruitment.Adjustments@gsk.com where you can also request a call.

Please note should your enquiry not relate to adjustments, we will not be able to support you through these channels. However, we have created a Recruitment FAQ guide. Click the link where you will find answers to multiple questions we receive

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We are a global biopharma company with a special purpose – to unite science, technology and talent to get ahead of disease together – so we can positively impact the health of billions of people and deliver stronger, more sustainable shareholder returns – as an organisation where people can thrive. Getting ahead means preventing disease as well as treating it, and we aim to impact the health of 2.5 billion people around the world in the next 10 years.

Our success absolutely depends on our people. While getting ahead of disease together is about our ambition for patients and shareholders, it’s also about making GSK a place where people can thrive. We want GSK to be a place where people feel inspired, encouraged and challenged to be the best they can be. A place where they can be themselves – feeling welcome, valued and included. Where they can keep growing and look after their wellbeing. So, if you share our ambition, join us at this exciting moment in our journey to get Ahead Together. Find out more on our career site.