Open to workSecurity + AI
Building tools that make AI safer

Petteri Kosonen

Security engineer building resilient systems, practical AI safety tools, and trustworthy automation. I bridge security and AI engineering.

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/projects --featured

Featured Projects

Prompt security testing and prompt engineering systems with practical output for real operations.

featuredsecurity spotlight

Prompt Security Guide

LLM security testing framework with jailbreak detection, defense testing, and JailbreakBench integration

  • Jailbreak defense validation and adversarial prompt testing workflows.
  • Benchmark-oriented checks for safer LLM deployment decisions.
  • Clear reporting model for repeatable prompt security reviews.
PythonJailbreakBenchSecurity evaluation
Inspect project
featuredsecurity spotlight

PromptKit

Prompt engineering toolkit with Prompt Doctor analysis and pattern library

  • Pattern-driven prompt library with reusable structures.
  • Prompt Doctor style analysis for prompt clarity and risk signals.
  • Workflow modules for faster prompt experimentation.
PythonPrompt patternsAI workflow tooling
Inspect project

VDI Performance Diagnostic

active
PowerShell

PowerShell tool for diagnosing VDI performance issues

github / case study

Honeypot System

active
Python

Meta honeypot implementation for security research

github / case study
/experience --timeline

Experience Timeline

IT Support Specialist

2M-IT

Nov 2022 - Present

  • Resolved cloud and endpoint incidents across enterprise Microsoft environments.
  • Supported healthcare critical apps with strong SLA and escalation discipline.
  • Improved patterns for troubleshooting and support reporting.

Security Trainee

2M-IT

Mar 2024 - Sep 2024

  • Investigated security alerts and request-driven threat signals.
  • Tested and evaluated Microsoft security product improvements.
  • Maintained and studied information security standards in operations.

IT Support Intern

theFirma

Jan 2018 - Jun 2019

  • Handled daily troubleshooting of endpoints and software issues.
  • Provided client-facing technical support with clear documentation.
/education --certs

Education & Certifications

Formal studies plus continuous lab work in modern cybersecurity and cloud systems.

Turku University of Applied Sciences

B.Eng. ICT, Data Networks and Cybersecurity

2020 - Present

Turku Vocational Institute

IT Technician, IT Support

2017 - 2019

TryHackMe activeSecurity labsMicrosoft ecosystem
/skills --matrix

Skills Matrix

Security

Operational
78%
Defender EDRThreat triageXSS/SQLi basicsTryHackMe labs

Cloud / Microsoft

Advanced support
85%
Entra IDIntuneExchange OnlineActive DirectoryOffice 365

Automation

Practical
72%
PowerShellPythonServiceNow flowsSQL diagnostics

AI / Prompting

Applied research
68%
Prompt engineeringLLM guardrailsJailbreak testingPromptKit patterns
/research --logs

Writing / Research Logs

Timestamped notes and experiments covering security engineering, diagnostics, and development tooling.

2024-12-01

Polymorphic Malware Detection

Exploring detection techniques for polymorphic malware

Read more

2024-11-15

Honeypot Implementation

Building a meta honeypot for security research

Read more

2024-10-20

VDI Performance Analysis

Diagnosing and troubleshooting VDI environments

Read more

2024-09-10

MFA Implementation Patterns

Different approaches to multi-factor authentication

Read more

2024-08-05

Compression Algorithms in Rust

Testing and comparing compression techniques

Read more

2024-07-01

Network Security Analysis

Tools and techniques for network security

Read more
send signalcontact.console

Let's build something secure.

Available for cybersecurity, IT support engineering, and AI/prompt security collaboration. Current timezone: Europe/Helsinki (UTC+2/UTC+3).

petteri@console ~

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