The strength of the Garda Reserve has been boosted to 1,242 members after the graduation of 125 recruits.
They include 78 people from 31 different countries.
Among those graduating was Nigerian-born Omotola Otesanya, from Dundalk.
Ms Otesanya (26) has already completed a degree in forensic science in England and her aim is to eventually join the full-time force where she could put her knowledge to use.
"It would be like CSI", she joked. "I hope to apply when recruitment begins again."
As a reservist, she is attached to Drogheda station but also works full time in an office.
Having lived in Ireland for the past 18 years, Omotola said she wanted to give something back to the community.
Also graduating yesterday was 20-year-old Sarah Sullivan, whose father, Pat, is the chief superintendent in the Kerry division.
From Tralee, Ms Sullivan will be attached to the Killarney station. She is in her third year of a commerce degree course at University College Cork.
Ms O'Sullivan said she developed an interest in police work watching her father and would like to join the full-time force.