Answer by taking a quote from the following article:

Luis Antonio Gokim Tagle (Tagalog: [lU'wis an'tonIo 'tagle]; born June 21, 1957) is the 32nd Archbishop of Manila. He has been Archbishop since December 12, 2011, and a cardinal since November 24, 2012. He also serves as President of Caritas International, a federation of Catholic relief, development, and social service organizations, and of the Catholic Biblical Federation. Tagle has become involved in many social issues in the Philippines with emphasis on helping the poor while maintaining opposition against what he terms "practical atheism", abortion, and contraception (equated with abortion in the Philippines).

In 2001, Tagle was appointed Bishop of Imus on October 22 and consecrated on December 12 after previously serving as parish priest of the Cathedral-parish of Imus. During his ten years in Imus, he made a point of living simply, owned no car, and invited the destitute to join him for a meal. At the first gathering of bishops under Pope Benedict XVI in 2005, the General Assembly of the Synod of Bishops, he spoke from the floor about the inadequacy of the number of priests in the Philippines. He said:  To respond to the hunger for the Eucharist, priests say many masses, accept multiple intentions and send lay ministers for the service of the Word with communion.... The faithful know the difference between a bible service and Eucharist, a priest and a lay minister. Many communities wait for the gift of the priesthood and the Eucharist with humility.  To the concept that priestly vocation are a gift from God he countered: "we should also ask whether the Church is a good steward of the gift." He told a news conference that "The first Sunday after my ordination as a priest, I said nine Masses, and that is regular in the Philippines." Discussing priestly celibacy, Cardinal Angelo Scola, the synod moderator, expressed reservations about modifications to the Church's requirement of celibacy for the priesthood. In response, Tagle suggested that the Church should consider such a change to combat the shortage of priests.  At the 2008 International Eucharistic Congress in Quebec, Canada, he delivered a talk on the importance of the Eucharist that, by one report, moved the audience to tears. He contrasted Christian worship with false forms of adoration:  It is sad that those who worship idols sacrifice other people while preserving themselves and their interests. How many factory workers are being denied the right wages for the god of profit? How many women are being sacrificed to the god of domination? How many children are being sacrificed to the god of lust? How many trees, rivers, hills are being sacrificed to the god of "progress"? How many poor people are being sacrificed to the god of greed? How many defenseless people are being sacrificed to the god of national security?

what did he do before that?
previously serving as parish priest of the Cathedral-parish of Imus.