Chrysler vice-chairman and president Tom LaSorda last week retired with immediate effect, the automaker said in a statement.

He had been the top executive responsible for manufacturing, procurement and supply, employee relations, global business development and alliances since August 2007, serving in both the office of the chairman and on the board of managers.

"As the head of our global business development, Tom LaSorda arranged the first meeting with Fiat and played a pivotal role in developing the alliance," said Bob Nardelli, Chrysler chairman and CEO who has has said he will step down after Chrysler completes its time in Chapter 11.

LaSorda's legacy at Chrysler includes the Toledo Supplier Park in Ohio which incorporates suppliers into major elements of the Jeep Wrangler vehicle line manufacturing process.

He was appointed president and CEO of Chrysler Group in 2005 after serving as chief operating officer. He was previously at General Motors in numerous roles including president of Opel's Eisenach plant in eastern Germany and head of quality, reliability and competitive operations.

Fiat chief Sergio Marchionne is expected to become chief executive of the 'new' Chrysler, which will be run by a new nine-person board.