Nestori Syynimaa
Principal Identity Security Researcher at Gerenios Ltd
Tampere, Pirkanmaa, Finland
Summary
🤩
Rockstar🎓
Top SchoolNestori Syynimaa is a Principal Identity Security Researcher at Microsoft and the proprietor of Gerenios Ltd, combining eight years in focused identity/cloud security with two decades of broader technology leadership. He is a recognized Office 365 and Azure AD expert, author of the widely used AADInternals PowerShell toolkit and a prolific contributor to tooling around access tokens, authentication flows and OAuth integrations. His career blends hands-on engineering, academic research (D.Sc.) and executive IT leadership—having served as CIO for multiple municipalities and led R&D and architecture teams across industry and academia. Nestori’s work uniquely bridges offensive and defensive perspectives on cloud identity, translating deep protocol-level knowledge into practical admin and research tooling. Based in Tampere, Finland, he pairs rigorous academic credentials with pragmatic consulting experience, often surfacing subtle authentication edge-cases that larger teams miss.
8 years of coding experience
12 years of employment as a software developer
Master of Engineering - MEng Cyber Security, Master of Engineering - MEng Cyber Security at JAMK University of Applied SciencesSpecialisation Education in Cyber Security Cyber Security, Specialisation Education in Cyber Security Cyber Security at Tampere University of Applied SciencesDiploma Product Management in International Markets, Diploma Product Management in International Markets at Teknillinen korkeakoulu-Tekniska högskolanD.Sc. in Economics Computer Science and Information Systems, D.Sc. in Economics Computer Science and Information Systems at University of JyväskyläPhD Informatics, PhD Informatics at Henley Business SchoolMSc Economics and Business Administration (Computer Science), MSc Economics and Business Administration (Computer Science) at University of VaasaProfessional Teacher Qualification Education, Professional Teacher Qualification Education at Häme University of Applied Sciences, HAMKBBa SME Business Administration Marketing, BBa SME Business Administration Marketing at Seinäjoki University of Applied Sciences
Stackoverflow
1reputation
0reached
1answer
0questions
Github Skills (12)
apim10
powershell10
authentication10
user-authentication10
api10
oauth10
azure-active-directory9
rest-api9
webapi8
sha6
encoding6
utf6
Programming languages (4)
Github contributions (5)
Gerenios/AADInternals
Oct 2018 - Nov 2022
AADInternals PowerShell module for administering Azure AD and Office 365
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 reviews, 77 commits, 29 PRs in 4 years 1 month
Contributions summary:Nestori's commits focus on creating and maintaining functions related to handling access tokens, authentication, and various API communications within the AADInternals PowerShell module. The primary focus is on defining and utilizing variables, creating utility functions to return user login information and authentication realms, and implementing API calls for OAuth. The user also developed features to retrieve and process information by calling different API like common/userrealm and credential types. Further contributions also include the development of functionality to parse and read access tokens.
powershelloffice-365powershell-moduleazuremicrosoft
Gerenios/public
Jul 2018 - Sep 2022
Contributions:16 commits, 17 pushes, 1 branch in 4 years 3 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.