You advise the departments as a central contact person for all topics related to SAP FI/CO and S/4HANA Finance, You will accompany the upcoming factory conversion of the existing SAP ERP system and subsequently play a key role in the greenfield setup of a new S/4HANA system, You support the departments in capturing, analyzing, and prioritizing requirements and develop viable solution approaches – both technically and functionally, You take responsibility in all project phases: conception, fit-to-standard workshops, customizing, test management, go-live preparation, and hypercare, You configure and optimize SAP Finance processes (FI/CO) in line with a clean core approach and work closely with internal teams and external partners, You create technical specifications for enhancements, accompany development, and conduct functional and integration tests, You support the continuous development of the Max Planck Society's accounting system and ensure up-to-date operational and process documentation, You take over 2nd and 3rd level support for SAP Finance applications