A 1995 Chrysler Neon has been converted to operate as a Natural Gas/Electric parallel hybrid vehicle to compete in the 1995 Hybrid Electric Vehicle Challenge. A hybrid strategy and vehicle control system have been developed to provide zero emissions within the city, and an automatic transition in hybrid mode between electric and CNG power. Emissions, driveability, consumer acceptability, and heating and air conditioning performance in hybrid mode were major considerations in this conversion. Modifications, components, and system functions are described in detail. Additional insights are included regarding performance, successes, and areas of further work. This vehicle placed third overall at the competition, achieved first place in three events, and received the award for best application of advanced technology.