[3] She moved to Manila in 2011 and pursued her college education taking up marketing management at the De La Salle–College of Saint Benilde where she graduated in 2016.

She competed and finished second runner-up at Miss Manila 2014, and won best in long gown and press choice awards.

As Miss Philippines Earth, her advocacy is focused on restoration, reforestation, and minimizing carbon footprint through ecotourism.

[11] Ong represented the Philippines and won Miss Earth 2015, held at Marx Halle, Vienna, Austria, on December 5, 2015.

[citation needed] On December 19, 2015, Ong joined the environmental group Ecowaste Coalition and launched the Iwas-Paputoxic campaign and urged the people, especially the youth, to welcome the 2016 New Year using safe and non-toxic materials.

[18] Ong led ten other beauty pageant titleholders in launching a project of the Armed Forces of the Philippines, dubbed as “Race to One Million Seedlings”, held in Camp Aguinaldo.

[21] As an ambassador for environmental protection campaigns in the Philippines, she joined a coastal cleaning effort on the coast of Freedom Island.

[22] She also participated with other women in a hand-painting exercise to raise awareness and develop a sense of public responsibility pertaining to environmentally sustainable practices on Earth Day.

[33] She also joined the Miss Earth Colombia 2016 candidates for the Todos Ponemos program to promote sustainable development, preservation of natural resources, and "the three Rs": reduce, reuse, recycle.

"[51][53] In December 2017, Ong was one of the awardees of 'Philippine Empowered Men and Women of the Year 2017' held at the Teatrino Prominade in San Juan, Metro Manila for her inspiring life story and her will to serve other people and communities.