WASHINGTON — With his choice of Jacob J. Lew to be the secretary of Treasury, President Obama on Thursday will complete the transformation of his economic team from the big-name economists and financial firefighters hired four years ago to budget negotiators ready for the next fiscal fights in Congress.

If confirmed by the Senate, the 57-year-old Mr. Lew — Mr. Obama’s current chief of staff and former budget director — would become the president’s second Treasury secretary, succeeding Timothy F. Geithner, who was the last remaining principal from the original economic team that took office at the height of the global crisis in January 2009.

While the team is changing, so far it is made up entirely of men who have been part of the administration since its first months. Gene B. Sperling, like Mr. Lew a veteran of the Clinton administration, is expected to remain as director of the White House National Economic Council. Alan B. Krueger, a former Treasury economist, continues as chairman of the Council of Economic Advisers and Jeffrey D. Zients, a former business executive, as acting director of the Office of Management and Budget.

That composition gives Mr. Obama a high degree of comfort with his economic advisers, who have experience in the budget struggles that have occupied the administration since Republicans took control of the House two years ago. Those struggles will resume later this month. Yet the continuity also plays into criticism that the president is too insular and insufficiently open to outside voices and fresh eyes in the White House.