The seventh of eleven children, he was born in San Fernando to a modest family. He went to high school at the Don Bosco Academy in Pampanga, where he graduated with honors and medals.
He was often praised by his teachers for being good at geometry and professional drawing, traits essential to architects. He enrolled at the University of Santo Tomas, where he took BS Architecture.
He was still an undergraduate student when he made his first projects: a grave for his grandfather and single story houses for his older siblings. Although he is the president of his class, he was unable to attend the debut exercises when he graduated in 1970 due to financial obstacles.
In 1972, he passed the architectural administration license exam and began his career. As a young professional, he thought of ways to increase his income. He pioneered the concept of design and construction. His initial projects were the design and construction of a display case for an optical store and the design and installation of vinyl flooring for a master bedroom. Eventually he made commercial buildings, residential condos and houses, institutional and religious buildings.
He worked for the Lazatin Consolidated Corporation in Angeles City, where he was in charge of building affordable homes. It was in this company that he met his wife, Marion.
In 1974, he began his private practice, turning his bedroom into an office. The following year, he and Marion married and resided in Pampanga where they raised a family of four. It eventually extended its architectural wings to Metro Manila. Some of its most important early customers were the Tropical Hut food chain and supermarket and the Don Bosco school buildings.
The architect Mangio had an entrepreneurial spirit early in his career. His clients sometimes called him an architect-businessman. He built houses for rent to Americans in Angeles City and developed a 1.2 hectare subdivision. People noticed his masterful work and eventually hired him to build their own vacation homes in Baguio and other places, including Metro Manila.
In 1986, he built the village of Paskuhan (Christmas), in which he received a marker of excellence from the United Architects of the Philippines.
He started his involvement in UAP as a member of the Pampanga chapter. Encouraged by national artist Francisco Mañosa, he founded the UAP Angeles City Chapter and became its very first president. He was also very active in the national affairs of the organization, of which he became director for region 3. He was then national treasurer of UAP before becoming its vice-president for operations.
There seemed to be no stopping Mangio’s success, until in June 1990, Mount Pinatubo erupted. A year later, the catastrophic Baguio earthquake struck and real estate activity collapsed, especially in central Luzon. What was once his thriving business has become a symbol of devastation.
The tragedies of Pampanga and Baguio forced Mangio and his family to move to San Juan, Metro Manila.
He kept his faith in God and worked harder. This great adversity brought him closer to his Creator. This is why he founded the Spirit of Love Community with architects from Pampanga as the first group of participants. He also became an active member of the Marriage Encounter Foundation of the Philippines.
In 2006 he became a good friend and disciple of Fr. Fernando Suárez. The healing priest told Mangio that he had long prayed for a servant-architect who could design places of worship and healing for his community, Mary Mother of the Poor Missionaries. Mangio was an answered prayer.
He designed the Monte Maria healing site in Batangas. He accompanies Suarez on several tours abroad, notably to the Vatican, where he meets the Pope.
As National President of United Architects of the Philippines, he presented the Life in the Spirit seminar to the organization. With faith in God and devotion to his mother, Mangio was soon back on the path to success. Big projects have flocked again like the Baywatch Tower in Manila. He eventually obtained his PRC license in environmental planning, interior design and as a real estate broker.
At the request of President Fidel V. Ramos, Mangio to build his Alabang museum and residence. He was also appointed director of BCDA, Fort Bonifacio Development Corporation, CDC and Philippine Expo. President Gloria Macapagal Arroyo appointed him President of Clark International Airport and the Subic Clark Alliance Development Council.
As the national president of the UAP, Mangio served for two consecutive terms. He led the fundraising activities for the organization. His tenure generated the highest net income for UAP, which became the seed capital for the acquisition of the land where the current UAP building in Quezon City was constructed. He also received the UAP Fellow award, as well as Arcasia Fellow, and certified as an APEC architect. He received many other awards for himself and his works. Grateful for his accomplishments, Mangio and his family became more determined to give back to the community. He has led outreach programs and other charities.
On April 22, Mangio received the coveted Likha Gold Medal Award from the United Architects of the Philippines (UAP). He is only the 15th architect to have received this prestigious award in 45 years.
Mangio’s family is his top priority: his wife and children Brian, Hazel Ann, Julie Ann and Michael, all involved in the family company, a happy, motivated and God-centered team.
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