A foundation member of the Redfern Labour League, the local branch of the Labor Electoral League of New South Wales, Holden served as treasurer of the electoral committee for the local member for Redfern, James McGowen. In February 1908, Holden stood for the Redfern Ward of Redfern Municipal Council and was one of seven Labor-endorsed candidates elected to the 12 member council, with Alderman John Leitch, with Holden's nomination, becoming the first metropolitan Labor Mayor in New South Wales. In February 1911, Holden was unanimously elected Mayor of the council with an annual allowance of £150. In March 1912, the now-Premier James McGowen advised Governor Lord Chelmsford to appoint 12 Labor candidates to a life appointment to the New South Wales Legislative Council and Holden was chosen alongside Edward Kavanagh, Francis Bryant, Henry Doyle, James Browne, Ernest Farrar, James Joynton Smith, James McInerney and Andrew Sinclair. Soon after his election however, Holden came under intense scrutiny from Sydney scandal sheet The Truth, who alleged that Holden, a personal friend of Premier McGowen, only employed non-union members in his hairdressing shop. Truth also alleged that McGowen was a patron of Holden's shop and paid a penny less than the minimum required by hairdressers' union members. T. W. Kelsey, general secretary of the Hairdressers and Wig-makers Employees' Union of NSW, confirmed the allegations: "It is a fact that Mr. Holden employs non union hairdressers in his shop at Redfern. He engaged a non-unionist hair dresser only a fortnight ago. He has two employees in his hairdressing saloon, and both, so far as I am aware, are non unionists. I, as secretary of this union, have openly denounced the Labor Government for appointing to the Legislative Council as a Labor member a man who thus defies union principles. He has been applied to several times by myself and others to employ only unionists, and he has always refused to give us any assurance that he would do so." Holden found himself under investigation from the Political Labor League which recommended to the 1914 state conference that Labor endorsement of his candidacy for Redfern council in the 1914 municipal elections be refused. Holden, retiring as mayor of Redfern, but continuing as an Alderman was nevertheless reelected in his council seat ahead of the Labor-endorsed candidate. By 1916, however, a Labor executive minute noted that Holden's employees in his shop were now union members and he was now able to continue as a Labor-endorsed member. Despite being a personal friend of McGowen, Holden did not follow him or John Leitch when they were expelled from the Labor party over the conscription question.
Later life
Holden opposed Jack Lang in the 1931 split and sat as Federal Labor until the reconstitution of the chamber in 1934, when he retired. Holden died on New Year's Eve at Ashfield in 1938 whilst still serving as a Redfern Alderman. His son Thomas Sinclair Holden was also a member of the council, elected at the first indirect elections for the council.
