His commitment to active [[membership]] at the Chicago Mercantile Exchange brought him to the chair of many committees that are integral to the exchange and its relationships with both the public and government. Rosenberg served on the CME board of directors from 1970 to 1995, and the maximum allowable term as chairman from 1977 to 1980. He also served as first vice-chairman of the board in 1976, and from 1983 to 1989. He was a member of the Executive Committee from 1975 to 1995 and held the chair from 1977 to 1980. Rosenberg was also chief legislative liaison from 1986 to 1994 and served as chairman of the International Steering and Strategic Planning Committees. He was elected senior policy advisor to the board in 1991.
He is the former chairman of the investment advisory board of [[Lake Shore Asset Management]], a [[hedge fund]] from which he resigned on Aug. 13, 2007. He was also the chairman of [[Resolute Capital Growth Fund]] until
== Education ==