Prior to his adult video work, he has worked as an underwear model for designers such as
Calvin Klein,
Armani, and
Dolce & Gabbana, as well as various fitness magazines. Made his debut on camera at the age of 24, performing
solos for the website
englishlads.com. Later, he appeared in other films for production companies such as
Colt Studios,
Raging Stallion,
Falcon Studios,
MEN.com,
Lucas Entertainment, UK Naked Men, among others. In 2016, O'Brian co-starred as The Winter Soldier in the gay porn parody of
Captain America. In September 2022, O'Brian had a cameo in the music video for
Sam Smith and
Kim Petras’ song "
Unholy". In March 2025, he signed as an exclusive performer for the studios brands NakedSword and
Falcon Studios, appearing in six series for the studio. In January 2026, O'Brian he won the
GayVN Award for Best Actor in recognition for his performance in
To the Nines, produced by Falcon Studios. == Personal life ==