Corey Alex Seaver commenced their acting career as a recurring high school extra on the second season of the controversial Netflix series 13 Reasons Why (Anonymous Content). About halfway through production, their first film appearance arrived as background in the Marvel Cinematic Universe entry Ant-Man and the Wasp.

Following this, opportunities began piling up and, following completion of aforementioned series' third season, Seaver began obtaining speaking roles in student and independent films, as well as attending scene study courses at the San Francisco branch of the Beverly Hills Playhouse. Among their repertoire of background work includes The OA, Always Be My Maybe and A Taiwanese Tale of Two Cities (Netflix), Wheels of Fortune and A Christmas Mystery (ESX), Fremont (Blue Morning), I'm a Virgo (Media Res), and Freaky Tales (Entertainment One).

In early 2020, their creative abilities rose to another level after writing, directing and shooting a segment for the horror anthology Ted Bundy Had a Son. Seaver, employed by a major movie theater chain as a means of consistent income, spends their free time watching a wide variety of film genres, with an affinity for coming-of-age stories, horror and musicals. They have penned short stories since seventh grade, and have only in the past few years advanced to screenplays. As of 2024, they aspire to finance, direct, and star in a short comedy-drama project, titled Alright.