Markus Lassfolk
Senior Vice President Incident Response (CSIRT) at Truesec
Stockholm, Sweden
Summary
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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 (83)
ai10
xiaomi9
powershell9
home-assistant-integration9
home-assistant9
eve9
vacuum9
sdn9
robot9
eve-online9
issue-tracking9
windows-server9
esi9
auto-discovery9
python8
Programming languages (9)
Github contributions (5)
markus-lassfolk/autonomy
Aug 2025 - Sep 2025
a smart automation layer for RUTOS/OpenWRT: multi-uplink failover, Wi-Fi optimization, GPS & OpenCellID, and system maintenance—self-healing, observable, and extensible.
Contributions:1 review, 24 PRs, 141 pushes in 24 days
markus-lassfolk/rutos-starlink-failover
Jul 2025 - Aug 2025
A set of scripts to make Starlink failover for RUTOS more stable and let Victron CX utilize RUTOS and Starlink for GPS info
Contributions:322 reviews, 132 PRs, 579 pushes in 1 month
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