Leif is currently leading multiple teams as a Senior Engineering Manager at Semgrep, the company behind the eponymous open-source tool and Application Security platform. Previously, Leif was a manager at Twilio Segment where his team was focused on building customer-facing security features and internal security tools.

Leif has worked in the information security space for over a decade, has helped organize multiple conferences and meetups, and is currently the co-host of the podcast 404: Security Not Found.