[6] She received a Bachelor of Fine Arts from Texas A&M University-Commerce, continuing with studies at the University of Illinois at Chicago, King's College London, and Werner Herzog's Rogue Film School, Los Angeles.
[6] O’Neil is known for her detailed narrative drawings that often contain art historical references and center on a theme of existential bleakness and absurdity.
[7][2] Traditionally, her monochromatic drawings have depicted "apocalyptic" scenes in which small human figures engage in acts of violence and trauma.
[2] Art critic Christopher French has noted of the artist's practice, "Inventing realities rather than describing aspects of nature, O'Neil's dreamlike vistas offer a potent combination of incorporated graphite collage elements so as to inject foreground detail into ambiguous and otherwise largely unmarked middle distances.
[28] In 2016, O'Neil directed a community collaborative drawing project with Harvester Arts in Wichita, KS.