Marcus is the General Manager of the International Horizon Scanning Initiative (IHSI), the launch of which he spearheaded in 2018. Under his direction, IHSI established a comprehensive global database of pharmaceutical products in the development phase, coupled with state-of-the-art data modelling tools. These advancements have been critical in bolstering healthcare systems' preparedness and enhancing the member state healthcare product negotiation potential.
Previously, he held the position as COO of EUnetHTA and is considered as one of the key architects of the European HTA system. In addition, in 2017, Marcus created the “Heads of Agency Meeting” which in 2021 led to the formation of the Heads of HTA Agencies Group, where he served as General Manager until 2023. This initiative unites key European HTA decision-makers, creating a forum to discuss and align on major strategic questions relevant to EU HTA agencies.