The many good works and the selfless nature of St Vincent de Paul are at the heart of St Vincent's Castleknock College. As a Vincentian School, an integral element of the college student development is the work done in the community. There are currently two conferences of The St Vincent de Paul Society in St Vincent's Castleknock College: The Fr. John Doyle CM Conference and the Fifth Year Conference. Membership is voluntary and neither conference is ever found wanting for applicants.
Volunteers in the TY conference participate in a community outreach programme whereby they engage in weekly visits to centers around Dublin like St Joseph's in Clonsilla, St Vincent's on the Navan Road, St Michael's in Glenmaroon, St Peter's Luncheon Club in Phibsboro and the Cherry Orchard Hospital Alzheimer's Unit. The Christmas tree sale, Christmas food appeal and the Christmas CD all provide much needed funds for the local SVP conferences.
Through their positive involvement in such pursuits the student volunteers develop a deeper appreciation for the core Vincentian values of the SVP as well of those of St Vincent's Castleknock College.