Meanwhile, Musk told employees Monday that the company plans to "flatten" its structure while working to improve communication and trim actions "that are not vital" to the company's success.
The chief executive said in his email that Tesla will still hire critical positions to support the Model 3 production ramp and future product development. Autopilot, a form of advanced cruise control, handles some driving tasks and warns those behind the wheel they are always responsible for the vehicle's safe operation.
Mr Schwall was the electric carmaker's main technical contact with USA safety investigators.
Later on Friday, the Wall Street Journal reported that Doug Field, the company's senior vice president of engineering, would take a "six-week sabbatical" before returning to the company.
"To ensure that Tesla is well prepared for the future, we have been undertaking a thorough reorganization of our company".
You've got barnacles on barnacles.
Tesla's management churn is among the reasons some investors say they are wagering against shares in the company, which is valued similar to General Motors Co despite selling a fraction as many vehicles and burning through billions in cash.
The driver of the fire truck was evaluated for whiplash but was not hospitalized.
Police are investigating whether a Tesla sedan's semi-autonomous Autopilot feature was engaged when it rear-ended a fire department truck in Utah.
Witnesses indicated the Tesla Model S did not brake prior to impact.
On 2 May a U.S. traffic safety regulator contradicted Tesla's claim that the agency had found that its Autopilot technology significantly reduced crashes.
There was light rain falling and roads were wet when the crash occurred, police said in a statement. WSJ fails to mention that Tesla is safest auto on road, which would make article ridiculous.
The crash comes as federal safety agencies investigate the performance of Tesla's semi-autonomous driving system.
In another Twitter message on Monday, Musk said the "probability of fatality is much lower in a Tesla", saying Tesla would begin reporting safety numbers from the second quarter of 2018.
The National Transportation Safety Board's (NTSB) spokesperson Keith Holloway said it has not opened up an investigation into the crash, but might yet do so.