Analytical Chemist - Mass Spectrometry

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. Discover more about our company wide benefits and life at GSK on our webpage Life at GSK | GSK Analytical Chemist – Mass Spectrometry 12-month Fixed-Term Contract / Secondment Job Purpose We are seeking a highly skilled and motivated Analytical Chemist with expertise in Mass Spectrometry (MS) to join the Analytical Chemistry team on a 12-month fixed-term contract. This role will focus on the operation and support of MS-based analytical platforms, with a strong emphasis on oligonucleotide analysis and high-throughput small molecule analytical workflows. The successful candidate will act as a subject-matter expert supporting multiple stakeholder groups, ensuring robust, high-quality data generation, interpretation, and instrument performance. In this role you will Deliver expert mass spectrometry support to chemists, including data investigation, interpretation, and execution of supplementary experiments as needed Maintain the operation of high throughput MS workflows and reporting systems, including RapidFire and LC-Charged Aerosol Detector-MS platforms Oversee daily operation and maintenance of High Resolution TOF/QTOF MS systems. Diagnose and resolve technical issues with mass spectrometry instrumentation and analytical methods. Ensure routine maintenance and calibration of mass spectrometry instruments to ensure data accuracy and reliability. Analyse and document experimental results, prepare technical reports, and communicate findings to key stakeholders. Provide timely updates to chemists on issues affecting operations, such as instrument downtime and data quality concerns. Collaborate with the Informatics team to provide analytical insights on data quality and interpretation. Support implementation and application of QTOF instrumentation for oligonucleotide analysis. Ensure compliance with all relevant regulatory guidelines and GSK quality standards. Why you? Basic Qualifications & Skills: We are looking for professionals with these required skills to achieve our goals: BSc in Chemistry, Analytical Chemistry, Biochemistry, or a related discipline, with hands-on mass spectrometry experience. Strong understanding of MS principles, including ionisation, fragmentation, and data interpretation. Experience with oligonucleotide analysis by mass spectrometry. Experience using MS data analysis software and reporting tools. Proven ability to troubleshoot complex analytical and instrumentation issues. Strong written and verbal communication skills, with confidence engaging diverse scientific stakeholders. Ability to work independently while contributing effectively within cross-functional teams. Preferred Qualifications & Skills: Please note the following skills are not necessary, just preferred, if you do not have them, please still apply: PhD in Analytical Chemistry, Chemistry, or related discipline, or MSc with significant relevant experience. Extensive hands-on experience with TOF/QTOF mass spectrometers. Familiarity with LC, UPLC, and RapidFire-based workflows. Experience working in high-throughput or open-access analytical environments. Closing Date for Applications: 8th February 2026 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. #LI-GSK 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 [email protected] where you can also request a call. 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For more information, please visit the Centers for Medicare and Medicaid Services (CMS) website at https://openpaymentsdata.cms.gov/ 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 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.