Michelle Fagan trained at the Dublin Institute of Technology. She worked for OM Ungers in Frankfurt and Arge Hoger Hare in Berlin, before returning to Dublin, where she worked for Ahrends Burton and Koralek. In 1998 she founded FKL Architects with Paul Kelly and Gary Lysaght.
She has taught at both the Dublin Institute of Technology and University College Dublin and was an assessor for the 2000 Royal Institute of the Architects of Ireland Travelling Scholarship.
FKL Architects has won numerous awards.