Fr. Raymond T. Holscher, S.J. was born on 19 March 1943 in Brooklyn, New York, U.S.A. He finished primary education at Holy Child Jesus School, Richmond Hill, N.Y. in 1957 and graduated at Brooklyn Preparatory School, N.Y. in 1960. On the same year, he entered St. Andrew-on-Hudson Novitiate, Poughkeepsie, N.Y. on 30 July. After first vows, he continued his Juniorate at St. Andrew-on-Hudson. He arrived in the Philippines in 1964 and studied Tagalog language at Ateneo de San Pablo. In 1965, he studied Philosophy at the Ateneo de Manila University until 1967.
He was one of the pioneers of Loyola House of Studies with fellow scholastics Venancio Calpotura, Artemio Ferrer, Florencio Cuerquis, Enrique Lalana, Mateo Sanchez, Felix Unson, Francisco Montecastro, and William Abbott. Afterwards, he did regency at Xavier University, Cagayan de Oro City until 1969 where he taught Religion, English, and Socio-Economics while moderator of Social Action and the Yearbook. Then, he studied and finished his Bachelor in Sacred Theology at the Loyola School of Theology, Quezon City. On 6 May 1972, he was ordained at St. Ignatius Church, N.Y. by Bishop Francisco Claver, S.J. Five years later, he did tertianship with Jesuit priests Arsenio Jesena, Antonio Lambino, Alfeo Nudas, Leo Pabayo, Michael Rooney, Antonio Samson, and Herbert Schneider at Sacred Heart Novitiate under Fr. Arthur Shea, S.J. He professed final vows on 8 December 1977.
Most of his priestly life was spent at the Ateneo de Manila High School. He was chaplain in 1973-1976, instructor of Religion and student counselor in 1973-1979, director of Admission and Aid Office in 1973-1984, 1992-1996, coordinator of student activities in 1979-1982, director of athletics in 1979-1987, associate principal for student affairs in 1997-1999, associate principal for formation in 1999-2004, and coordinator of Christian Service Program in 2001-2004.
His ministries outside Ateneo de Manila High School comprised of chaplaincy for Joint U.S. Military Advisory Group and Christian Family Movement in 1973-1986, Philippine Jesuit Prison Service in 2004-2007 and National Training School for Boys (Boys Town) in Tanay in 2007-2016. He was also director of athletics in college and university in 1979-1996 and treasurer of the Jesuit Residence in 2003-2012.