Caterham has parted company with technical director Mark Smith and formed a 'technical committee' in a bid to move it up the Formula 1 grid.
The committee, which consists of former performance director John Iley, ex-deputy technical director Jody Egginton and chief engineer Gerry Hughes, will report directly to team principal Cyril Abiteboul.
All three have also assumed new roles within the squad, with Iley becoming head of performance engineering and Eggington now head of design and manufacturing. Hughes retains his role as chief engineer but will combine that with the role of head of trackside operations.
Abiteboul paid tribute to Smith, who had been with the squad since 2011, but said the restructure was essential for the team to try and move forward.
"It was obviously a tough decision to see someone of Mark's calibre go," he said, "but we have identified the need to restructure as a key aspect of increasing our on-track performance and forming a new technical committee will allow us to do exactly that.
"After investing last year in our new factory, and over the winter in aerodynamic development capacity, the new structure gives three specialists we are lucky to have with us the opportunity to use their experience, passion and dedication to help us progress.
"We are not happy with our current performance levels and John, Jody and Gerry, with my full support and that of our shareholders, staff and partners, are the right people to help take us forward."