David Von Oheimb
Senior Key Expert Research Scientist at Siemens Technology
Munich, Bavaria, Germany
Summary
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Rockstar🎓
Top School
Top expert inComprehensive Software Development and Security Technologies
David Von Oheimb is a Senior Key Expert Research Scientist based in Munich with over 13 years of hands-on experience designing and developing PKI software and security architectures. At Siemens Technology he leads security evaluations (Common Criteria), formal-methods based IT security analyses, and mentors colleagues while managing industry and EU projects. He holds a PhD in Computer Science from TUM and maintains active ties to academia and standards committees, bridging research and industrial deployment. A practical open-source contributor, he has improved X.509 and CMP handling in the widely used OpenSSL library, focusing on interoperability, diagnostics, and robust certificate path verification. Colleagues rely on him for clear security guidance that blends formal rigor with production-grade implementation. Outside project work he curates further material at DDvO.net, reflecting a long-term personal investment in secure systems engineering.
12 years of coding experience
5 years of employment as a software developer
PhD, Computer Science, PhD, Computer Science at Technical University of Munich
Github Skills (8)
c1710
ca10
cert10
c1110
certificate-authority10
x50910
openssl10
cryptography10
Programming languages (17)
Github contributions (5)
openssl/openssl
Aug 2017 - Jan 2023
TLS/SSL and crypto library
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2013 reviews, 1007 commits, 996 PRs in 5 years 5 months
Contributions summary:David's contributions primarily involve implementing and modifying functionality within the OpenSSL library, focusing on improvements to the Certificate Management Protocol (CMP) and the processing of X.509 extensions. Their work includes adding support for new CMP features, fixing bugs related to parsing, memory management, and ensuring interoperability with different types of certificates and keys, along with improved diagnostics and error handling. They specifically worked on refining certificate chain building and verification, with an emphasis on ensuring that certificate trust paths function correctly.
crypto-librarycryptographyssltlscrypto
DDvO/web
Mar 2022 - Nov 2022
Contributions:157 pushes, 3 branches in 7 months
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