In November 2010, Guillen moved to work for Tesla Motors.
 Whilst demonstrating the Tesla Model X at the North American International Auto Show in January 2013, Guillen stated that he did not regret the move to Tesla in California, but did miss the German dishes of Käsespätzle and Maultaschen, plus visiting the Stuttgart Ballet.
 By April 2015 Guillen was receiving a remuneration of $4.5 million per year.

In a 2013 interview, Guillen discussed "BlueStar" (codename for the Tesla Model 3 project), stating that Tesla was expecting to produce 400,000 cars per year.
 During ramp up of the Tesla Model 3 in June 2018, Elon Musk stated who should be contacted to offer help, with Guillen listed as overseeing General Assembly 4 (GA4):
Wherever you are in the company, if you feel you can help out in any of those areas, please check in with Jat Dhillon on GA3, Jerome Guillen on GA4 and Omead on EoL and JB Straubel or Chris Lister on Module Zone 4.

— Elon Musk, 15 June 2018,
In November 2010, Guillen moved to work for Tesla Motors.  Whilst demonstrating the Tesla Model X at the North American International Auto Show in January 2013, Guillen stated that he did not regret the move to Tesla in California, but did miss the German dishes of Käsespätzle and Maultaschen, plus visiting the Stuttgart Ballet.  By April 2015 Guillen was receiving a remuneration of $4.5 million per year.
In a 2013 interview, Guillen discussed "BlueStar" (codename for the Tesla Model 3 project), stating that Tesla was expecting to produce 400,000 cars per year.  During ramp up of the Tesla Model 3 in June 2018, Elon Musk stated who should be contacted to offer help, with Guillen listed as overseeing General Assembly 4 (GA4):
Wherever you are in the company, if you feel you can help out in any of those areas, please check in with Jat Dhillon on GA3, Jerome Guillen on GA4 and Omead on EoL and JB Straubel or Chris Lister on Module Zone 4.
— Elon Musk, 15 June 2018,
Jerome Guillen