Dan Pilone is Rational Certified in OOAD, RUP, and Rose. His previous employer was a Rational Partner and Dan has taught (formally as well as informally) quite a few UML classes for Hughes, ARINC, UPS, Georgia Systems Operation Center (GSOC), and the Naval Research Laboratory (NRL). As a software architect for clients, Dan has made extensive use of UML (in all views of the architecture) to help convey information to management, developers, team leads, and requirement folks (doing use case analysis in a UML-like fashion).
Dan is also Sun J2EE Enterprise Architect certified, which required him to submit his own EJB designs using UML sequence, class, and collaboration diagrams. Dan has worked at Hughes Inc. developing a satellite communication system for which they did real-time UML modeling, and also large numbers of State Diagrams to model the acquisition/control stages.