Harry Krischock was employed as a clerk by Hutchison, Craker and Smith, publishers of Quiz and the Lantern, from at least 1897. By the early-1900s, however, he was advertising himself a photographer. Between 1903 and 1907 Krischock was largely associated with the Critic, and from 1906 until 1909 with the Australasian and Garden and Field newspapers. In later years he was also a photographer for the Advertiser, Express and Telegraph and the Chronicle.
Krischock began his career in cinematography in 1911 with the Wondergraph Company and continued shooting newsreels and documentaries for the firm through until the 1920s. He was also photographer for four South Australian feature films: Remorse, a Story of the Red Plague (1917), Our Friends, the Hayseeds (1917), What Happened to Jean (1918) and Why Men Go Wrong (1922).