Lab Technician Synthesis or arrangement

At Welmedis, we drive drug discovery through cutting-edge science and advanced technologies to develop breakthrough therapies. Our aim is to accelerate preclinical development for targeted cancer treatments. Through computational and automated state of the art chemistry, our focused and results‑driven approaches seek to promote innovative research in the area of personalized cancer therapy. This is where next‑generation research translates into tangible impacts - and it’s just the beginning.

As Welmedis expands its research and development activities in Wädenswil, we are looking for a Lab Technician to join our Medicinal Chemistry Lab. In this role, you will support chemists in the drug discovery process for small molecules and contribute to the development of new anticancer agents. Working closely within an interdisciplinary team, you will be involved in the synthesis and characterization of new chemical structures and play a key role in confirming and validating synthesized compounds, ensuring high-quality and reliable experimental results for ongoing medicinal chemistry research.

• Self-planning and accomplishment of objectives according to instructions given by the superior or other Chemists
• Document synthesis details and analytical results in the ELN on a daily basis
• Document deviations from planned activities / results and propose alternative solutions using synthesis databases
• Optimization of reaction conditions and purification processes steps
• Analysis and identification of reaction products by using appropriate analytical tools including HPLC, MS and NMR
• Purification of compounds by chromatography
• Collaborate and share information with other technicians to improve working processes
• Collaborating closely and supportive as part of an international team
• Demonstrate continuous improvement of lab work
• Ensure compliant disposal of chemical waste from working environment
• Ensure working environment is safe, clean and compliant with EHS and chemical regulations at all times
• Review appropriate safety documentation to ensure full understanding of operation and risks using chemicals to ensure maintenance of laboratory safety

• Apprenticeship as a lab technician or equivalent qualification
• + 3 years of professional experience in organic synthesis
• Experience performing analytical methods (NMR, HPLC, LCMS) and interpretation of results
• Able to work in a results driven environment, flexible to changing priorities and work within deadlines
• Good communication skills, both written and verbal in English. Additional knowledge of German is a plus

• An international, growing company focused on cancer drug discovery and research
• Flat hierarchy with direct communication and short decision paths
• 40-hour work week with fair overtime compensation
• 25 vacation days per year and complete flexible holiday planning
• Day-off on your birthday
• Attractive social insurance and pension benefits
• Lunch cost contribution
• Support for further education and professional development
• Four team events per year fostering collaboration and team spirit
• Annual company volunteer day - because giving back matters to us

To apply, please send your CV, qualifications/diplomas, and reference letters to