Leszek Miś — Founder
Leszek Miś is the Founder of Defensive Security, Principal Trainer, and Security Researcher with almost 20 years of experience in Cyber Security and Open Source Security Solutions market. He went through the full path of the infosec carrier positions: from OSS researcher, Linux administrator, and system developer, Solution Engineer, and DevOps, through penetration tester and security consultant delivering hardening services and training for the biggest players in the European market, to become finally an IT Security Architect / DFIR / SOC Security Analyst with deep non-vendor focus on Network and Endpoint Security attack and detection. He's got deep knowledge about finding blind spots and security gaps in corporate environments. Perfectly understands technology and business values from delivering structured, automated adversary simulation solutions and training. He focuses on hands-on: Chained Attack Paths, Emulating attacker's TTPs, and running detection/response at the same time by using Sysmon and EVTX, Auditd, Wazuh, Graylog, HELK, ElastAlert, Falco, OSQuery, Velociraptor DFIR, Zeek IDS, Suricata IDS, Moloch FPC, Volatility Framework, theHive, MISP, and Sigma Rules and more. Recognized speaker and trainer: BruCON, Black Hat USA, OWASP Appsec USA, FloCon USA, Hack In The Box Dubai / AMS / Singapore / Abu Dhabi, Confidence PL, PLNOG, Secure PL, Open Source Day PL, Red Hat Roadshow. Member of OWASP Poland Chapter. Author of many IT Security training: PurpleLabs: Linux Forensics Inspection and Incident Response at scale PurpleLabs: Windows Forensics Inspection and Incident Response at scale PurpleLabs: Post-Exploitation and Evasion Techniques PurpleLabs: Adversary Emulation and Breach Attack Simulations PurpleLabs: Network Advanced Detection & Threat Hunting PurpleLabs: C2 Matrix Operator PurpleLabs: C2 Infrastructure Deployment and Automation PurpleLabs: Advanced Linux Security and Hardening PurpleLabs: Advanced SELinux PurpleLabs: Openshift / Kubernetes Security PurpleLabs: Web Application Firewall PurpleLabs: Linux Administration Essentials PurpleLabs: Open Source Defensive Security Components for SOC PurpleLabs: FreeIPA Administration Holds many certifications: OSCP, RHCA, RHCSS, Splunk Certified Architect. His areas of interest include network "features" extraction, OS internals, and forensics. Constantly tries to figure out what the AI/ML Network Security vendors try to sell. In his free time, he likes to break into the "IoT world" just for fun, cooking, hip-hop, drum&bass, and aggressive skating. *** Still learning hard every single day ***
Stackforce AI infers this person is a Cyber Security Architect with extensive experience in offensive and defensive security solutions.
Location: Gmina Wilkowice, Śląskie, Poland
Experience: 21 yrs 9 mos
Skills
- Cyber Security
- Training
- It Security Architecture
- Threat Hunting
- System Administration
Career Highlights
- Founder of Defensive Security with 20 years in Cyber Security.
- Expert in adversary simulation and detection response.
- Recognized speaker at global security conferences.
Work Experience
Collective Sense
VP & Head of Cyber Security (2 yrs 4 mos)
Defensive Security
Founder | Trainer | Principal Cyber Security Threat Expert (10 yrs 8 mos)
B2B Sp. z o.o.
IT Security Architect/Trainer (5 yrs 10 mos)
Linux Polska Sp. z o.o.
IT Security Architect/Trainer (6 yrs 9 mos)
Altkom Akademia S.A.
Instructor/Consultant (3 yrs)
Emerge Systems
Founder | Principal IT Security Architect (19 yrs 1 mo)
Interia.pl
System Administrator (5 mos)
Open-E GmbH
System Administrator/Security Expert (2 yrs 3 mos)
