Neeman has chaired or been a member of numerous national and international committees, including the Executive Committee of Bar-Ilan University, the public committee appointed by the Speaker of the Knesset to determine salaries and other payments to government officials, the public committee appointed by the cabinet for the Drafting of the Constitution, the Public Committee on Educational Centers, the Public Committee on Privatisation Issues of El Al, the board of governors of Bank of Israel, the Committee for the Conversion Law, the National Committee for the Identification of Fallen Soldiers in Times of Emergency, Israel Atomic Energy Committee and the Central Committee of the World Bank.
On 8 December 2009, while serving as the Minister of Justice, Ne'eman was reported as saying that he believed that Halakha should gradually be made binding law in Israel, with the ultimate goal of making Israel a Halakhic state. But he later denied this, emphasizing that "the Knesset is the legislator in Israel, and the interpretation of its laws is determined by the [civil] courts." He said that he advocated the use of religious courts only in an auxiliary role, to "resolve financial disputes in accordance with the principles of Jewish law. The court system in Israel is backed up, and therefore, cases should be transferred to an alternative system."