Lawrence Teo has been an OpenBSD user since 2000 and an OpenBSD developer since 2012. His contributions to OpenBSD are primarily in the network area, including libpcap, tcpdump, PF, divert(4), and the network stack. Lawrence is also the co-founder of Calyptix Security, where he leads a development team that deploys OpenBSD-based firewalls and other security solutions for businesses.