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Giancarlo Guizzardi
Born	(1975-04-22) 22 April 1975 (age 49) Vitória, Espírito Santo, Brazil
Nationality	Brazilian-Italian
Citizenship	Brazilian, Italian
Alma mater	University of Twente
Known for	Conceptual Modeling, Ontology, OntoUML
Awards	ER Fellow 2023
Scientific career
Fields	Computer science
Institutions	University of Twente Semantics, Cybersecurity & Services
Thesis	Ontological foundations for structural conceptual models
Doctoral advisor	Chris Vissers, Luís Ferreira Pires, Marten van Sinderen
Doctoral students	Tiago Prince Sales, Claudenir Morais Fonseca, Ítalo Oliveira, Cristine Griffo, Maria das Graças da Silva Teixeira, Glenda Amaral, Victorio Albani Carvalho, Xiaowei Wang, Guylerme Figueiredo, João Rafael Nicola, Bruno Borlini, Elena Romanenko, Isadora Vale Sousa, Rodrigo Calhau
Website	people.utwente.nl

Giancarlo Guizzardi (born 22 April 1975 in Vitoria, Brazil) is a Brazilian–Italian computer scientist specializing in conceptual modeling, enterprise modeling, applied ontology and ontology-driven information systems.^[jargon] He is a professor at the University of Twente, in The Netherlands, and a senior researcher and founding member of the Ontology & Conceptual Modeling Research Group (NEMO)^[1] in Vitoria, Brazil.^{[citation needed]}

He is a strong advocate of an approach to Conceptual Modeling known as Ontology-Driven Conceptual Modeling (ODCM). ODCM proposes that, since Conceptual Modeling is about representing conceptualizations of reality to support human understanding communication and problem-solving, it must rely on foundations that take formal ontology in philosophy, cognitive science, philosophical logics and linguistic seriously.^[2]

He defended his PhD thesis in 2005 in the University of Twente (with the highest distinction). His thesis, entitled Ontological Foundations for Structural Conceptual Models, lays the foundation of what came to be known as the Unified Foundational Ontology and the OntoUML language.^[2]