Markus Lassfolk
Senior Vice President Incident Response (CSIRT) at Truesec
Stockholm, Sweden
Summary
👤
Senior🎓
Top SchoolMarkus Lassfolk is a seasoned cybersecurity and infrastructure executive with over 25 years of hands-on experience and 11 years in senior leadership roles, currently serving as Senior Vice President of Incident Response (CSIRT) at Truesec. He built and leads a globally distributed, low-turnover CSIR team that combines digital forensics, threat intelligence, crisis communication and rapid business recovery to protect and remediate medium to enterprise clients across the Nordics, Europe and the US. As CEO of Truesec entities he scaled consultancy offerings and earned industry recognition including Microsoft Gold Partner accreditation, blending deep Windows/Azure expertise with strategic customer focus. Markus is known for turning high-pressure incidents into learning opportunities through strong communication and structured knowledge transfer that leaves client teams capable and autonomous. He fosters a sustainable, collaborative culture for experts across time zones, prioritizing both technical excellence and staff wellbeing. Not obvious from titles: he also runs a long-standing industry podcast and frequently speaks at technical events, bridging practitioner insight with public-facing education.
11 years of coding experience
13 years of employment as a software developer
Engineer's degree, IT, Engineer's degree, IT at ABB Industrigymnasium
English, Swedish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (80)
esi10
eve9
eve-online9
issue-tracking9
windows-server9
cert8
powershell8
negotiation8
powershell-module8
python8
openxml8
sdn8
system-center8
windows7
opencti7
Programming languages (6)
Github contributions (5)
markus-lassfolk/EVE-Online-ESI-Posh
Apr 2018 - Nov 2021
Powershell Module for using EVE Online ESI API Library
Contributions:62 commits, 2 PRs, 38 pushes in 3 years 7 months
apievepowershellesipowershell-module
TrueSec-Infra/Public
Feb 2019 - Jan 2020
Scripts and solutions for the community and our customers!
Contributions:3 commits, 2 PRs, 2 pushes in 11 months
pythonwindowsdevopspowershellcustomers
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