Prior to calling, Mairi-Clare spent seven years working for the Crown Office and Procurator Fiscal Service. Latterly, she held the position of Senior Procurator Fiscal Depute which involved the preparation and prosecution of complex cases including historic and sexual offending.

She has a significant amount of court experience having prosecuted a variety of offences at both summary and solemn level in Hamilton, Airdrie and Lanark. She has extensive experience dealing with difficult cases that involve vulnerable witnesses and expert witnesses.