After leaving Lambeth School of Art, McKie became a member of staff to 'Bystander' magazine from 1915 to 1929. She was also a contributing artist to The Graphic, Sphere, Autocar, and Queen publications.
She illustrated books, created mural designs, and painted the artwork for posters. Her most famous works are the pair posters "Waterloo Station – War" and "Waterloo Station – Peace" which were published by Southern Railway in 1948 to celebrate the centenary of Waterloo station.
During the First World War, a lot of her drawings focused on the war effort. After the war, she sketched scenes taking place at London nightclubs.
- David Buckman (2006). Artists in Britain Since 1945 Vol 2, M to Z. Art Dictionaries Ltd. ISBN 0 953260 95 X.
- Grant M. Waters (1975). Dictionary of British Artists Working 1900-1950. Eastbourne Fine Art.
- "Helen McKie, artist and illustrator: papers - Archives Hub". archiveshub.jisc.ac.uk. Retrieved 6 January 2021.
- The inking woman : 250 years of women cartoon and comic artists in Britain. Streeten, Nicola., Tate, Cath, 1951-, Cartoon Museum (London, England). Oxford: Myriad Editions. 2018. p. 22. ISBN 0-9955900-8-7. OCLC 1007312174.CS1 maint: others (link)
- 1 artwork by or after Helen McKie at the Art UK site
- V&A Archive of Art and Design: Helen McKie, artist and illustrator: papers, 1889–2004