In 2014, Manikan was nominated by the PMPC Star Awards as Best Supporting Actor for Bamboo Flowers.
Since then, he had acted with Dulaang UP, Manila Metropolitan Theater, Bulwagang Gantimpala and Tanghalang Pilipino of the Cultural Center of the Philippines (CCP).
He also played roles in Kabesang Tales,[citation needed] Joe Hill, The Caucasian Chalk Circle, Rehas Sa Tubig, Solo Entre Las Sombras, General Goyo, The Boor, Henry IV (Pirandello), Mando Plaridel, Canuplin, Marat Sade, Kang Tse, Bombita, Pilipinas Circa 1900, Bien Aligtad, Puntila and Matti, Pantaglieze, The Iceman Cometh, Maliw[4] and Mga Ama Mga Anak.
[5] Manikan's filmography consists of local and international productions, with roles in Lino Brocka's Maynila sa Kuko Ng Liwanag and Bona, and Ishmael Bernal's Broken Marriage and Himala.
He went on to work with American and European directors in Behind Enemy Lines, Saigon Commandos, HBO's A Dangerous Life, Le Zhan Chang An, In Naam der Koningin, Tatort-Manila, Au Bout De Rouleau, and Amigo.