Tesla Motors has filled two of about 150 job openings as it moves to sell more cars and get the Model S on the road. The company announced today that John Walker, formerly the general manager of sales operations at Audi, will be Tesla’s new VP of North American sales. …. “Despite its small size, Tesla has become a significant player in the automotive industry and has already served as a powerful catalyst for other automakers to develop green vehicles,” Reyes said. …