The New York City Police Commissioner is the head of the New York City Police Department and presiding member of the Board of Commissioners. The commissioner is appointed by and serves at the pleasure of the mayor. The commissioner is responsible for the day-to-day operations of the department as well as the appointment of deputies including the Chief of Department and subordinate officers. Commissioners are civilian administrators, and they and their subordinate deputies are civilians under an oath of office, not sworn members of the force. This is a separate position from the Chief of Department, who is the senior sworn uniformed member of the force. The First Deputy Commissioner is the Commissioner and department's second-in-command. The office of the Police Commissioner is located at the NYPD Headquarters, One Police Plaza. Both the commissioner and first deputy commissioner outrank all uniformed officers, including the chief of department. Theodore Roosevelt, in one of his final acts as Governor of New York before becoming Vice President of the United States in March 1901, continued reforms he began when he was police superintendent by signing legislation that replaced the police commission and office of the police chief (previously the superintendent) with a single police commissioner. The current police commissioner is Keechant Sewell, who had previously been Chief of Detectives for the Nassau County Police Department. On December 14, 2021, the mayor-elect Eric Adams confirmed that he would appoint Sewell as the first female police commissioner of the NYPD. She took office on January 1, 2022. The Commissioner's responsibilities include: To ensure the effective day-to-day operation of the department To appoint the board of Commissioners, the Chief of the Department and all subordinate officers To ensure the safety and protection of New York City and its population To ensure the department enforces city, state and federal law List of superintendents, chiefs, and commissioners Pre-1901 Prior to 1901, the New York City Police Department was run by a board of four to six commissioners. The following is a list of some of the most famous members of the Police Commission: Presidents of the Board of Commissioners Members of the Board of Commissioners George Washington Matsell, 1845–1857, Superintendent John Alexander Kennedy, 1860–1863, Superintendent Abram Duryée, 1873–1874, Commissioner George Washington Walling, 1874–1885, Superintendent William Farrar Smith, 1875–1881, President of the Board of Commissioners Fitz John Porter, 1884–1888, Commissioner Frederick Dent Grant, 1894–1898, Commissioner Theodore Roosevelt, 1895–1897, President