As a veteran of theater, television and film, Lamangan directed a multitude of multi-awarded films such as The Flor Contemplacion Story (1995), Deathrow (2000), Aishite Imasu 1941: Mahal Kita (2004), Felix Manalo (2015) and the critically acclaimed Mano Po film franchise. His works have won him a plethora of awards throughout his long career. He received his first Best Director award in 1995, and the Golden Pyramid Award at the Cairo International Film Festival in the same year. He won the NETPAC Award for his film Hustisya (2014) at the Cinemalaya. In 2019, he was awarded the Hall of Fame Award at the Metro Manila Film Festival, and the Lifetime Achievement Award at the International Film Festival in Manhattan.
Lamangan circled back to theater in 2013 after being named as Gantimpala Theater’s Artistic Director where he directed an original musical called Katipunan: Mga Anak ng Bayan.