He is currently CEO of Codenotary Inc., a provider of solutions to record business data immutably, using and initiator of the open source project immudb.io. He was previously a general partner of Texas Atlantic Capital LP, a venture capital company. Prior to that, he was a co-founder of Qumranet. Qumranet was sold to Red Hat in 2008 for US$107 million.
He previously founded the company behind the Xen software, XenSource, which was sold to Citrix for US$500 million in 2007. Before that he founded Qlusters Inc, and was the founder, main developer and project manager of openMosix. Furthermore, he frequently acts as an angel investor in high-tech start-up companies such as Hyper9, Neebula, Delivery Hero SE, and Qlayer, which was sold to Sun Microsystems in January 2009.
Before entering the high-tech business, he was a career officer in the Israel Defense Forces.