Jeff Mesnil is employed by Red Hat as a Senior Software Engineer and currently, works for JBoss, Red Hat's middleware division, on the WildFly and JBoss EAP application servers. He is a member of the core team in charge of developing the internals of the application servers and lead its messaging subsystem (which provides the JMS API).
Previously, he contributed to the HornetQ messaging broker that was integrated into WildFly and EAP.
He is a proponent of Open Source development and all the code he writes either professionally or privately is available under Open Source licenses, these days, it is mostly hosted on GitHub.
He has a keen interest on messaging systems and wrote several Open Source libraries related to messaging.