Salary: 56.000 - 92.000 € per year Requirements: PhD degree in discipline of the natural sciences, preferably chemistry Knowledge and experience in online mass spectrometry (AMS, ACSM, PTR-MS) and field campaigns Knowledge and experience in offline analytical instrumentation (IC, LC-MS) would be beneficial High intrinsic motivation, ability to work both independently as well as a part of a team, competent cooperation with international teams Strong organizational skills Very good knowledge of the English language, at least some basic German would be beneficial Valid EU drivers license and willingness to travel frequently to the observatory site, including overnight stays Experience with data processing software such as IGOR, R, MATLAB, etc. including programming skills would be beneficial Background knowledge in atmospheric chemistry and physics would be beneficial Responsibilities: Operation of a suite of online mass spectrometers (ToF-ACSM-X, VOCUS-PTR-MS) and further instrumentation to measure atmospheric composition in the gas and particle phases Operation of offline instrumentation such as filter samplers and cloud water collectors during dedicated campaigns Implementation of ACTRIS quality assurance (QA/QC) measures and standard operating procedures (SOP) for the metrics of the respective devices, where not already in place Implementation of workflows for data processing, data control and data transfer in accordance with the ACTRIS data center guidelines Regular validation and submission of the acquired data to the ACTRIS database Participation in ACTRIS intercomparison workshops at European topic centers providing support for the respective device Participation in ACTRIS-related and other events, including conferences, technical tutorials, workshops, etc. Supervision of the Center for Cloud Water Chemistry, an ACTRIS topical center unit Analysis and interpretation of measurement data and preparation of scientific publications Technologies: Cloud Support Matlab Network DevOps More: We are the Leibniz Institute for Tropospheric Research, a distinguished research institute within the Leibniz Association, specializing in aerosol and cloud research. Our Atmospheric Chemistry Department (ACD) is seeking an experienced and motivated scientist to join our team at the Schmücke Cloud Observatory (SCO) as part of the European research infrastructure ACTRIS. We offer excellent opportunities for scientific publication and personal development, access to a state-of-the-art research infrastructure, and the chance to collaborate within a strong international research network. This position includes a fixed-term contract of about 3 years, with the possibility of extension pending funding. Our location in Leipzig provides a vibrant work environment along with flexible working hours and support for work-life balance. We value diversity and encourage qualified women and individuals with disabilities to apply. last updated 11 week of 2026