MD Johnson, Inc. announces the completion of the sale of the Pioneer Centre dealerships in San Diego, California as well as the Pioneer Centre dealerships in Denver, Colorado. Pioneer owned and operated an Audi dealership, Porsche dealership and Land Rover dealership in San Diego, on Miramar Blvd next to the Miramar Marine Corps air base, formerly the Miramar Naval Air Station, home of the Top Gun fighter pilot school. Pioneer Centre also owned and operated two Land Rover dealerships in the suburban Denver, Colorado market.