Sam Hartman
Machine Learning Engineer at Hadron Industries
Denver, Colorado, United States
Summary
👤
Senior🎓
Top SchoolSam Hartman is a Machine Learning Engineer and seasoned systems architect with over 30 years of experience building internet, cloud, and security infrastructure. He combines deep expertise in authentication and protocol design—authoring and contributing to Kerberos work used across major OSes—with recent hands-on work applying Transformers, PyTorch and scaling tools like FSDP/DeepSpeed to human-centered AI projects. Sam has led large open-source and standards efforts (including serving as Debian Project Leader and IETF Security Area Director) and brings that consensus-driven, product-focused approach to designing extensible, usable systems. His background spans banking, distributed storage, entitlement management and secure media-sharing platforms, and he has designed bespoke synchronization and CI systems (Entanglement and Carthage) that prioritize policy-aware isolation. Based in Denver, he blends low-level debugging and cross-platform porting experience (e.g., adapting MIT krb5 for AIX) with current research into AI safety and intimacy-focused applications.
30 years of coding experience
6 years of employment as a software developer
MIT
Github Skills (11)
c1710
aix10
user-authentication10
authentication10
c1110
policies10
radius10
shared-libraries9
kerberos9
build-system8
network-programming8
Programming languages (9)
Github contributions (5)
krb5/krb5
Jun 1995 - Jun 2014
mirror of MIT krb5 repository
Role in this project:
Back-end Developer
Back-end DeveloperContributions:932 commits in 19 years 3 months
Contributions summary:Sam's commits primarily involved adapting the MIT Kerberos 5 code to support building on AIX, including addressing include file issues and implementing shared library functionality. They focused on resolving compilation problems and integrating the code base with the AIX environment. The user also made modifications to various utilities to accommodate the new system configuration.
krb5mitlinuxwindows
FreeRADIUS/freeradius-server
Jul 2014 - Mar 2015
FreeRADIUS - A multi-protocol policy server.
Role in this project:Back-end Developer
Back-end DeveloperContributions:17 commits, 1 PR, 4 comments in 8 months
Contributions summary:Sam contributed to the FreeRADIUS server by fixing bugs and implementing improvements in the core functionality. They addressed issues related to IP address masking, ensuring correct behavior with a 0 prefix and proper use of signed loop counters. Furthermore, they modified realm-related modules, focusing on updates to configuration naming conventions and improved error handling and COI implementation within the trustrouter module, leading to more robust proxy routing. Additionally, they modified the error message for the dynamic setting.
policymulti-protocolarpdot1xbfd
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