November 20, 1947
Feast Day:
August 28
Patron Saint:  St. Augustine
First Vows:
April 28, 1970
Perpetual Vows:
May 1, 1976
Golden Jubilee of Religious Life: November 1, 2020 at the Louis Marie de Montfort Hall, Assumption College Thonburi

Royal Decorations

Member (Fifth Class) of the Most Noble Order of the Crown of Thailand.
เบญจมาภรณ์มงกุฏไทย ชั้นที่ 5
Member (Fifth Class) of the Most Admirable Order of the Direkgunabhorn.
เบญจมดิเรกคุณาภรณ์ ชั้นที่ 5
Companion (Fourth Class) of the Most Admirable Order of the Direkgunabhorn.
จตุตถดิเรกคุณาภรณ์ ชั้นที่ 4

Rev. Bro. Dr. Achin Tengtrakul
served in several highly significant managerial positions at the following St. Gabriel Foundation Schools:

1973-1976 Teacher, Assumption College Sriracha
1980-1981 Principal & Superior, Assumption College Ubonratchathani
1982-1985 Head of Financial Department, St. Gabriel’s College
1989-1990 Sub-Director & Bursar, Assumption College
1990-1995 Principal & Superior, Assumption College Rayong
1996-1997 Head of Boarding Department, Assumption College Sriracha
1997-2001 Vice Superior, Assumption College
2001-2004 Principal & Superior, Assumption College Sriracha
2004-2007 Principal & Superior, Assumption College Thonburi
2010-2012 Principal & Superior, Montfort College, Chiangmai
2013-2015 Superior & Director, Saint Louis Chachoengsao
2016- Vice President for Administrative Affairs
2020- Acting Vice President for Student Affairs.

“A short self-reflection of a man- a perfectionist,

but not a perfect religious. He loves God and God
loves him and God has compassion on him and
always forgives him. That is the reason, he is still
faithful to God up to now. That man is, Bro.
Augustine Achin Tengtrakul; 50 years in
Religious Life”

(Read More: the 50th Anniversary of Religious Life)

Bro. Achin’s Celebratory Time @AU

Receiving From the Royal Family, Utmost Kindness

Rev. Bro. Dr. Achin Tengtrakul was presented with pin of honor by H. M. Queen Suthida Bajrasudhabimalalakshana on the occasion of Assumption University’s 50th Anniversary Celebration, on December 7, 2019, at Suvarnabhumi Campus.

AU Annual Activities

Rev. Bro. Dr. Achin Tengtrakul participated in the Wai Kru ceremony during which AU students assemble to pay humble respect expressing their gratitude and appreciation to the university management.

Participated in Commencement Exercises, Participants were administrators, the faculty, students and graduated who successfully completed the bachelors', masters', and doctoral degrees in various fields.

Participated in Assumption Day Celebration, the main event took place at the Chapel of St. Louis Marie de Montfort followed by the crowning ceremony at the Seat of Wisdom in the front of The Cathedral of Learning Building, Suvarnabhumi Campus.

Participated in the annual celebration of the Chapel of St. Louis Marie de Montfort, The Holy mass celebrated in the Chapel of St. Louis Marie de Montfort, Suvarnabhumi campus.

Thai Arts and Cultures Activities

Led by Rev. Bro. Dr. Achin Tengtrakul, a group of AU administrators, faculty members, staff and students presented a carved candle and other goodwill offerings to the Sukhun Tawat Temple, Bangbo District. In keeping with the traditions of the Buddhist Lent observation and to encourage faculty and international students appreciate Thai cultural values & significance of Buddhist practices.

Participated in Songkran festival marking the beginning of the traditional “Thai New Year” was as usual celebrated at Assumption University of Thailand, Suvarnabhumi Campus.

Particapated in AU Loy Krathong festival at Sala Jaturamookpaichitr, Suvarnabhumi campus, to preserve and promote a Thai tradition.

Corporate Social Responsibility Activities

The underprivileged children being housed and cared for at the Camillian Home were treated to a very special lunch during a visit by AU representatives, led by Rev. Bro. Dr. Achin Tengtrakul and a group of staff members, on January 19, 2019. The visiting Samaritan group also donated a sum of money, food items and other necessities for the benefit of these handicapped and marginalized children.

Led a group of AU personnel to visit Baan Hatai Garoon, charity home for disadvantaged children, Chachoengsao, on February 24, 2018. The visiting group donated sports equipment and money contributed by various departments and faculties for the benefits of these unfortunate and socially disadvantaged children lacking opportunities for proper education.

Other Activities

On August 16, 2022, Rev. Bro. Dr. Achin Tengtrakul, participated in the planting activity, performed in honor of H.M. Queen Sirikit The Queen Mother, in celebration on the Auspicious Occasion of Her Majesty Queen Sirikit The Queen Mother’s 90th Birthday Anniversary 12th August 2022. The activity was held at AU Learning Centre Chalermphrakiat, Kanchanaburi province.

The AU community members congregated at the Louis Marie de Montfort Hall, Assumption College Thonburi, on November 1, 2020 to honor and celebrate Rev. Bro. Dr. Achin Tengtrakul 's 50th Anniversary of his religious life.

On August 28, 2019, Rev. Bro. Dr. Achin Tengtrakul, participated in the planting activity of the Yellow Star Plant (ต้นรวงผึ้ง); performed in honor of H.M. King Maha Vajiralongkorn Phra Vajiraklaochaoyuhua on the occasion his recent coronation ceremony and to show loyalty to H.M. The auspiciously initial planting occasion was also to mark the feast day of Rev. Bro. Dr. Achin Tengtrakul and to signify the momentously blessed Assumption University’s 50th Anniversary and as well part of the activities to reduce global warming.

Rev. Bro. Dr. Achin Tengtrakul participated in the Inauguration of the “Bro. Martin Pendulum” Landmark on the 1st floor of the Vincent Mary School of Engineering, Suvarnabhumi Campus on November 11, 2020.


Feast Day of Saint Augustine, 28th August


Augustine was born in Thagaste in Africa of a Berber family. He was brought up a Christian, but left the Church early. He spent a great deal of time seriously seeking the truth, first in the Manichaean heresy, which he abandoned on seeing how nonsensical it was, and then in Neoplatonism, until at length, through the prayers of his mother and the teaching of St. Ambrose of Milan, he was converted back to Christianity. He was baptized in 387, shortly before his mother’s death.

Augustine had a brilliant legal and academic career, but after his conversion, he returned home to Africa and led an ascetic life. He was elected Bishop of Hippo and spent 34 years looking after his flock, teaching them, strengthening them in the faith and protecting them strenuously against the errors of the time.

He wrote an enormous amount and left a permanent mark on both philosophy and theology. His Confessions, as dazzling in style as they are deep in content, are a landmark of world literature.
The Second Readings in the Office of Readings contain extracts from many of his works.

He was declared a Doctor of the Church by Pope Boniface VIII in 1308.


Second Reading: St Augustine of Hippo (354 - 430) (n.d.).

St. Augustine of Hippo. (n.d.). Catholic.