He is best known for his roles as Mikhail Tanner in the Peacock fantasy horror series Vampire Academy (2022), Luke Posner in the ITV soap opera Emmerdale (2019-2021), and Alasdair "Base" Newman in the BBC medical drama Casualty (2018–2019).
[4][5] In 2016, Parker portrayed Paul in Kiss Me, Kate, and starred as the Tin Man in The Wizard of Oz, which earned him a nomination for Best Supporting Performance at the UK Theatre Awards.
[9] In August 2018, Parker began appearing in the BBC One medical drama Casualty as Alasdair "Base" Newman on a recurring basis.
[15][16][17] In 2024, Parker is set to star alongside Miles Heizer and Vera Farmiga in the Netflix series The Corps.
[18] Parker is openly gay, after coming out during an interview with Attitude magazine in December 2020, in which he confirmed he was in a relationship with Emmerdale co-star Kris Mochrie.