
Chester Wisniewski
Chester Wisniewski is Director, Global Field CISO at next-generation security leader Sophos. With more than 30 years of security experience, his interest in security and privacy was first piqued while learning to hack from bulletin board text files in the 1980s, and has since been a lifelong pursuit.
Chester works with Sophos X-Ops researchers around the world to understand the latest trends, research and criminal behaviors. This perspective helps advance the industry's understanding of evolving threats, attacker behaviors and effective security defenses. Having worked in product management and sales engineering roles earlier in his career, this knowledge enables him to help organizations design enterprise-scale defense strategies and consult on security planning with some of the largest global brands.
Based in Vancouver, Chester regularly speaks at industry events, including RSA Conference, Virus Bulletin, Security BSides (Vancouver, London, Wales, Perth, Austin, Detroit, Los Angeles, Boston, and Calgary) and others. He’s widely recognized as one of the industry’s top security researchers and is regularly consulted by press, appearing on BBC News, ABC, NBC, Bloomberg, Washington Post, CBC, NPR, and more.
When not busy fighting cybercrime, Chester spends his free time cooking, cycling, and mentoring new entrants to the security field through his volunteer work with InfoSec BC. Chester is available on LinkedIn (https://www.linkedin.com/in/chester-wisniewski/).
For press inquiries, email chesterw [AT] sophos [.] com.
Content by Chester Wisniewski

Security Operations
Active Adversary
The Active Adversary Report: Safety in numbers
February 24, 2026

Security Operations
Threat Research
CVE
Featured
MITRE
Moving CVEs past one-nation control
April 17, 2025

Threat Research
2FA
aitm
authentication
Featured
MFA
passcode
WebAuthn
The future of MFA is clear – but is it here yet?
March 20, 2025

Security Operations
Pacific Rim
Pacific Rim thought leadership
Sophos X-Ops
Pacific Rim: What’s it to you?
October 31, 2024

Threat Research
CISA
Featured
law enforcement
Ransomware
Secure by Design
Sophos X-Ops
Defenders assemble: Time to get in the game
May 7, 2024

Threat Research
2024 threat report
Featured
pig butchering
PigButchering
ShaShuPan
Small business
Sophos X-Ops
Telegram
The 2024 Sophos Threat Report: Cybercrime on Main Street
March 12, 2024

Threat Research
Featured
law enforcement
Lockbit
Ransomware
Sophos X-Ops
takedown
LockBit: Lessons learned on winning the war on cybercrime
February 21, 2024

Threat Research
ALPHV ransomware
CIRCIA
Featured
Final Rule
SEC
Arrested Intimidation
December 14, 2023

Products & Services
Privacy
Security
web security
Top 10 tips to protect your privacy and safety during the online shopping season and beyond
November 21, 2023