Trinidad's acting career began when he was accepted for a supporting role in the 2003 primetime TV series ''
Basta't Kasama Kita,
which starred Judy Ann Santos. In 2004, Trinidad also played supporting roles in the film Aishite Imasu 1941: Mahal Kita and in the sci-fi fantasy series Krystala'', both of which also starred Santos. In later interviews, Trinidad credited Santos for helping him further hone his acting skills. In 2006, Trinidad landed a breakout role when he was cast in the lead role of Cardin" Medel opposite
Kristine Hermosa in the 2006 drama series
Gulong ng Palad. In 2008, Trinidad moved to
GMA Network at the suggestion of
Eddie Gutierrez who was a good friend of Trinidad's father. Gutierrez's wife
Annabelle Rama also became Trinidad's manager. Trinidad made his directorial debut in 2010 when his indie film
Mga Kinahinatnan ng Aking Kabalbalan was featured in the 2010
Cinemalaya Philippine Independent Film Festival. Trinidad starred as Robert Naval in
Jerrold Tarog's 2013 Cinemalaya film
Sana Dati, for which he won his first acting award as Best Supporting Actor. Trinidad and Tarog would continue to collaborate in the 2017 psychological thriller film
Bliss and in the 2019 historical epic
Goyo: The Boy General where he portrayed the older version of President
Manuel L. Quezon in the epilogue. He has also starred in other indie productions such as the 2015 film
Sleepless and the 2016 hybrid animated film
Saving Sally. Trinidad played the role of Bruce Niles, a closeted gay man, in the Philippine staging of the off-Broadway play
The Normal Heart in its 2015 run. In 2019, Trinidad made his last television appearance in
The Gift as a guest star. ==Personal life==