Harold Carr is the engineering lead for enterprise web services interoperability at Sun Microsystems - enabling atomic transactions, reliable messaging and security between Java and Windows Communications Foundation. Previous to this role he was responsible for RMI-IIOP load-balancing and fail-over in the Sun Java System Application Server (SJSAS). He designed the core architecture used in Sun's CORBA ORB and in the JAX-RPC 2.0 reference implementation and the scalable socket communications architecture used in SJSAS HTTP and IIOP remoting. He helped write the OMG Portable Object Adapter specification and was chairperson of the OMG Portable Interceptor specification. Previous to Sun, he did distributed computing research at Hewlett-Packard Research Laboratories and Schlumberger Research Laboratories, was Chief Architect of Visual Lisp technology at Autodesk, and was a logic simulation consultant for Cirrus Logic. He holds a Ph.D., in Computer Science from the University of Utah.