Tesla's Chief Financial Officer Zach Kirkhorn has helped turn the electric-car manufacturer into a profit machine, making the EV automaker a Wall Street darling. Despite working behind the scenes and maintaining a low profile, Kirkhorn is credited with implementing manufacturing efficiencies that have led to Tesla's profitability and helped the company amass a substantial cash reserve. Kirkhorn's technical training and business acumen have enabled him to lower production costs and improve efficiency, ultimately contributing to Tesla's success. Some Tesla board members have even mentioned him as a possible successor to Musk as CEO, although doubts remain about Musk stepping aside in the near future.