Kostas Konstantinidis is a consultant in digital strategy and funding for major cultural projects and organizations. In his role as CEO of PostScriptum over the past three decades, he has developed extensive experience in the design, management, and implementation of complex cultural programs and initiatives, working closely with partners and institutions across the cultural sector. Through innovative projects and strategic collaborations, he has supported the work of significant cultural organizations, helping them strengthen their connections with communities, education, tourism, the creative industries, international cultural diplomacy, and the wider economy. He strongly advocates for the meaningful use of digital technologies in culture and for empowering the cultural sector through open knowledge and digital transformation. He actively supports quintuple helix initiatives in the Greek regions, encouraging collaboration among public institutions, academia, industry, civil society, and the environment. At the international level, he promotes bridges between cultures, fostering dialogue and building relationships based on mutual respect. He also serves as the official representative of Europeana in China, contributing to international cultural cooperation and knowledge exchange. He believes in constructive public–private partnerships in the field of culture and in what he describes as “healthy entrepreneurial self-interest,” always with full awareness of the sensitivities of cultural policy and a strong commitment to ethical standards. He is also Chairman of the Board and Administrator of WikiEllinisti, a new initiative created through the collaboration between the Wikimedia Community of Greece, the only organization in Greece officially recognized by the Wikimedia Foundation, and PostScriptum. WikiEllinisti is a non-profit organization dedicated to developing the infrastructure that enables individuals, communities, and institutions to record, document, and publish reliable knowledge about Greece and the Greek language within international open knowledge ecosystems, including Wikipedia, Wikimedia Commons, and Wikidata. Its mission is to mobilize and support these actors in contributing trustworthy, well-documented content while building a sustainable and open digital knowledge infrastructure. Through this work, WikiEllinisti seeks to strengthen the presence of Greek knowledge and culture on the internet, advance the creation of reliable open data resources, foster digital skills and active citizenship, and help reduce knowledge gaps and underrepresentation within the global digital knowledge ecosystem.