James Allison has returned to the role of technical director in a Mercedes leadership reshuffle.
Allison replaces Mike Elliott, who will remain with the Formula One team as chief technical officer.
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Elliott had taken over as technical director in 2021, when Alisson switched to become chief technical offer combined with other work such as being part of the INEOS Britannia America's Cup team.
With Red Bull having replaced Mercedes as the dominant force in F1 following regulation changes, the Silver Arrows are striving to turn their fortunes around as they sit third in the early-season constructor standings.
An off-track change was confirmed by the team on Friday, with Alisson and Eliott switching jobs once again.
"Mike has led a review of our technical organisation to ensure we have the right structure to deliver sustainable success in the future," said a Mercedes spokesperson.
"We are focused on building the best racing car – and building the best team to develop that car, with everybody playing to their greatest strengths in the organisation."
Mercedes team boss Toto Wolff told Autosport: "This was very much driven by Mike Elliott owning the process. So, we have reversed the roles.
"Mike has moved up to CTO, as he has a brilliant switched-on scientific mind. And James Allison has returned to his technical director position, reporting into Mike.
"What Mike's assessment was, and the introspection is really admirable, is that with James we have a gladiator on the field and the troops are going to go through the fire for him and with him.
"Mike came to the conclusion that the way he approaches things, his skill set, is best utilised in developing the organisation going forward: from technical capabilities to human capabilities and putting together the structure that can be successful for many years to come."