 He was soon made a partner in his uncle's business, which as Austin & Warner existed from about 1855-1858.Warner then established an independent practice until 1867 when he partnered with Charles Coots under the firm name of Andrew J. Warner & Co. After this he had an independent practice, then from 1875-1877 partnered with James Goold Cutler (1848-1927) in a firm known as Warner & Cutler.Warner was the father of Rochester architect John Foster Warner (commonly called J.