Ryan 'elfmaster' O'Neill is a computer security researcher at Leviathan Security and the maintainer of Bitlackeys.org, a hub for much of his independent research. He is a Reverse engineer, and a Software engineer, who also specializes in the ELF binary format, and delivers on going workshops in this area to interested parties, including the US government. Ryan has worked on many security technologies including but not limited to:

Ryan has produced alot of research and publications in areas pertaining to Linux kernel and userland malware, such as "Linux kprobe instrumentation from phrack 66", and is author of soon to be released book "The art of Linux binary analysis" which focuses on everything from ELF internals to Linux Viruses, and Binary protection techniques. Ryan has been involved in the computer security scene since 1999.