Brian Callahan
Director, Monmouth University Cybersecurity Research Center at PECE Development Group
West Long Branch, New Jersey, United States
Summary
👤
Senior🎓
Top SchoolBrian Callahan is a cybersecurity researcher, educator, and OpenBSD developer with 13 years of experience bridging applied security, systems programming, and academic leadership. As Director of Monmouth University's Cybersecurity Research Center and a Specialist Professor, he leads research in quantum security, generative AI for cybersecurity, and secure toolchains while teaching courses from modern binary exploitation to cloud security and certification prep. He has significant open-source credentials—contributing OpenBSD support and platform-specific fixes to major D language projects (phobos, dmd, ldc) that demonstrate deep OS-level systems expertise. Brian also serves as CSO and lead developer for the PECE digital humanities platform, blending security engineering with academic collaborations and global deployments. Outside of academia and OSS, he founded a nonprofit to support marginalized developers and maintains a technical blog and amateur radio practice, reflecting a mix of community building and hands-on tinkering.
13 years of coding experience
12 years of employment as a software developer
Master of Arts (M.A.), Anthropology, Master of Arts (M.A.), Anthropology at Monmouth UniversityDoctor of Philosophy (Ph.D.), Science & Technology Studies, Doctor of Philosophy (Ph.D.), Science & Technology Studies at Rensselaer Polytechnic InstituteBachelor of Humanities and Arts (B.H.A.), Music Performance and Anthropology, Bachelor of Humanities and Arts (B.H.A.), Music Performance and Anthropology at Carnegie Mellon UniversityHigh School Diploma, High School Diploma at Old Bridge High School
Github Skills (21)
debug10
back-end-development10
dword10
openbsd10
standard-library10
compiler-compiler10
zlib10
assembler10
dt10
compiler10
backend10
llvm9
programming-language9
posixct9
algorithms9
Programming languages (21)
Github contributions (5)
dlang/dmd
Mar 2021 - Dec 2022
dmd D Programming Language compiler
Role in this project:
Back-end Developer
Back-end DeveloperContributions:12 reviews, 46 commits, 21 PRs in 1 year 9 months
Contributions summary:Brian primarily focused on enhancing the D programming language compiler (dmd) by adding support for OpenBSD. Their work included integrating OpenBSD-specific system calls, modifying the backend code to align with OpenBSD's requirements, and adapting the build process. The user also incorporated OpenBSD's specific libraries and system calls to facilitate the compilation and linking process, indicating a strong understanding of OS-specific compiler behavior. These changes allowed the compiler to function correctly on the OpenBSD platform.
compilersnativedubdmdstandard-library
ldc-developers/ldc
Mar 2021 - Dec 2022
The LLVM-based D Compiler.
Role in this project:Back-end Developer
Back-end DeveloperContributions:1 review, 42 commits, 2 PRs in 1 year 9 months
Contributions summary:Brian primarily contributed to the D programming language compiler, focusing on OpenBSD-specific support and enhancements. Their work involved modifying the compiler's target settings, incorporating OpenBSD-specific system calls (pledge, unveil), and syncing OpenBSD-related error codes and system information. They also added support for backtrace functionality and made adjustments for OpenBSD-specific runtime behavior.
compilerldcdlangllvmd
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