Dr. Moniz, a physicist, is a professor at M.I.T. and director of that institution’s Energy Initiative, an industry-financed group that does research on energy technologies and climate change.

Dr. Moniz told the ethics officer of the Energy Department, in a letter made public by the Office of Government Ethics on Friday, that he would resign from all of those positions upon his confirmation as energy secretary by the Senate.

He also said he would follow government rules requiring him to not participate in decisions affecting those entities. He plans to sell his ICF shares within 90 days of his confirmation. Dr. Moniz has already been criticized for failing to disclose his ties to ICF and other firms in a study produced by his program at M.I.T., on the future of natural gas.