[citation needed] In 1998, he received his computer science degree for his thesis "Prozeßkettenmodellierung am Beispiel der Gießwerkzeugentwicklung und prototypische Implementierung auf Basis des EDM/PDM – Systems Metaphase" (An example of process chain modelling in casting tool development and prototype implementation on basis of the EDM/PDM – Systems Metaphase).
Jeckle was also a W3C[1] and OMG representative of DaimlerChrysler Research and developed technical standards for XML, UML 2.0, and others.
[citation needed] On 11 June 2004, he died while giving aid to others who had a car accident on a German highway.
Tim Berners-Lee, whom Jeckle had previously collaborated with, spoke on his death, "Mario's involvement in the World Wide Web Consortium is a symbol of collaboration: with his time and talent, he has helped create a space that can be shared by people; that brings you together to learn, develop and gain new knowledge together.
Mario has undertaken the difficult task of gaining a foothold in an established group with energy and enthusiasm.