Joosua Santasalo
Principal Threat Researcher
Helsinki Metropolitan Area Finland
Summary
🤩
Rockstar🎓
Top SchoolJoosua Santasalo is a Principal Threat Researcher specializing in Identity Threat Detection & Response with over six years of focused experience defending enterprise cloud identity platforms. He architects Node.js/TypeScript detection services and policy-as-code pipelines that translate identity research into scalable, multi-tenant Entra ID/M365 detections and mitigations. A former Microsoft MVP and MSRC Most Valuable Researcher, he pairs deep Azure AD/AD FS expertise with hands-on engineering of Graph API integrations, CI/CD testing, and YAML-based conditional access policies. Joosua’s background spans consultancy and productized research—he’s equally comfortable running rapid prototypes to prove attack classes as he is operationalizing them in XDR/SIEM environments. Based in Helsinki, he quietly blends developer pragmatism with public-facing security research and responsible disclosure.
6 years of coding experience
9 years of employment as a software developer
Vocational Qualification in Business Information Technology, Business technology, Vocational Qualification in Business Information Technology, Business technology at Omnia Vocational Qualification in Business Information TechnologyReserve Officer School, RUK
Github Skills (41)
azure-active-directory10
llm10
active-directory10
mistral10
golang10
scenarios9
security9
llama9
go9
ollama9
scanning9
gemma9
seccomp8
azure8
effort8
Programming languages (4)
Github contributions (5)
jsa2/kql
May 2022 - Dec 2022
Contributions:16 commits, 73 pushes, 1 branch in 6 months
jsa2/CloudShellAadApps
Dec 2021 - May 2023
Contributions:4 PRs, 100 pushes, 5 branches in 1 year 5 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.