Álvaro del Portillo position held Prelate of Opus Dei
He then dedicated himself exclusively to the ministry and government of Opus Dei as its Secretary General. During the pontificate of Pope Pius XII (1939–1958), he worked in several Dicasteries of the Holy See. He met with that pontiff in a private audience on 4 June 1943 and met with Giovanni Battista Montini (the future Pope Paul VI) on the following 17 June.
In 1963, he was named by Pope John XXIII as a consultant on the Pontifical Commission for the revision of the Code of Canon Law. Pope Paul VI named him consultant on several post-Conciliar commissions. In 1975, he was chosen general president of the Opus Dei and successor of Josemaría Escrivá de Balaguer, and in 1982, the Holy See appointed him as the first Prelate of Opus Dei. In 1991, he was consecrated a bishop by Pope John Paul II, with Archbishops Giovanni Battista Re and Justin Francis Rigali serving as co-consecrators. That same year, he attended World Youth Day in Czestochowa.
He has written extensively about pastoral and ecclesiological matters that examine among others, the role of the lay faithful in the Roman Catholic Church, the human side of priestly formation, the dynamics and functionality of pastoral structures. As Prelate, he also served as Grand Chancellor of the University of Piura in Peru.
Shortly after his 80th birthday, he returned to Rome on a pilgrimage from the Holy Land. He died shortly thereafter.  He had celebrated his last Mass at the Church of the Cenacle. Later that day, Pope John Paul II came to pray before del Portillo's remains, which now lie in the crypt of the Church of the Prelature, Our Lady of Peace at Bruno Buozzi 75, Rome.Contribution to the Second Vatican Council
The history of del Portillo's involvement is as follows:
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