LEON STARR has been developing real-time and embedded software with executable models since 1984 when he began working with Steve Mellor and Sally Shlaer. His models have been used in factory material transport control systems, ultrasound diagnostic and cardiac pacing systems, gas chromatography and semiconductor wafer inspection systems, video post-production systems, and networked military battle simulators. As a Staff Systems Engineer at the Toyota Research Institute he developed open source models of the driving environment for validation of level 5 autonomous vehicles.

Leon is the author of How to Build Shlaer-Mellor Object Models, Executable UML: A Case Study and Executable UML: How to Build Class Models. He actively develops Executable UML models for clients worldwide, teaches courses in Executable UML and is a founding member of Model Integration, LLC in San Francisco, CA.

After years of frustration with monolithic, time wasting, carpel tunnel inducing, pixel pushing tools he has initiated Blueprint MBSE so that modeling can benefit from the same quality of tooling as that provided by modern software development environments.