In his email to staff, Musk said Tesla was "flattening the management structure to improve communication", combining functions and trimming activities "not vital to the success of our mission" in the reorganisation. 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.
"To be clear, we will continue to hire rapidly in critical hourly and salaried positions to support the Model 3 production ramp and future product development".
Mr Schwall was the electric carmaker's main technical contact with U.S. safety investigators.
This is not the first time a Tesla has collided with a fire engine while its Autopilot mode was engaged.
"To ensure that Tesla is well-prepared for the future, we have been undertaking a thorough reorganization of our company", Musk said in the memo, obtained by CNBC. So there's going to be a lot of barnacle removal.
He complained to another that the questioning was dry.
Tesla has slumped more than 5% amid its four-day losing streak.
In this Friday, May 11, 2018, photo released by the South Jordan Police Department shows a traffic collision involving a Tesla Model S sedan with a Fire Department mechanic truck stopped at a red light in South Jordan, Utah.
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The motorist suffered a broken ankle and was taken to a hospital while a firefighter escaped unharmed.
"Tesla has not yet received any data from the vehicle and thus does not know the facts of what occurred, although it appeared to be a high-speed collision", the statement said.
According to the Agency, at the time of the accident the electric vehicle was on autopilot.
There was light rain falling and roads were wet when the crash occurred, police said in a statement.
Elon Musk has said the "short burn of the century" is coming soon to investors betting against Tesla Inc.
In Utah Tesla vehicle ran into the auto of the fire brigade. Two people died in that incident, although the NTSB does not believe that Tesla's semi-autonomous system was to blame.
A day later, another engineer, Matthew Schwall, who was also Tesla's primary technical contact with the National Transportation Safety Board, left for competitor Waymo, an offshoot of Google, the Wall Street Journal reported.