Draženko Celjak is the head of Data management department at SRCE – University of Zagreb University Computing Centre. He coordinates and leads the development of several national infrastructures and services for open science, including the national repository infrastructure DABAR and Portal of Croatian scientific and professional journals HRČAK. He is member of EOSC-A Long-Term Data Preservation Task Force. He is currently involved in the EU funded project Creating a Robust Accessible Federated Technology for Open Access (CRAFT-OA). His main focus is the development of the infrastructure for open science.