Prior to founding Imperas, Simon was a VP in Synopsys following its successful acquisition of Co-Design Automation, the developer of SystemVerilog. Prior to founding Co-Design Simon was an executive or European GM with 5 US based EDA startups including Chronologic which pioneered the compiled code simulator VCS, and Ambit which was acquired by Cadence for $280M. Simon was one of the original developers of the HILO logic simulation system, and co-authored the definitive book on SystemVerilog.