// security researcher

I'm yokaihex

(Johnathan Arneson)

Principal Threat Research Engineer exploring the intersection of threat intelligence, vulnerability research, and AI-augmented security.

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Background

I'm a security researcher with a career built across the threat intelligence and vulnerability research landscape. Currently a Principal Threat Research Engineer at Recorded Future, I focus on identifying and analyzing emerging threats at scale.

Previously, I spent years at Cisco Talos (originally joining through Sourcefire before the Cisco acquisition), where I developed expertise in malware analysis, threat hunting, and building detection capabilities that protect millions of endpoints.

I'm particularly interested in how AI and automation can augment security research — making defenders faster, more thorough, and better equipped to handle the scale of modern threats.

2013 Sourcefire
2013–2025 Cisco Talos
2025–present Recorded Future

Writing & Analysis

Get in Touch

Open to conversations about threat research, vulnerability disclosure, AI+security, and collaboration.

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