Mrs Peters-Gallagher is a Partner in Moore Stephens Chartered Accountants and Registered Auditors and Business Advisors. The practice has a network of 5 offices employing 150 staff throughout Northern Ireland and is a member firm of Moore Stephens International.

She is a Fellow of the Institute of Chartered Accountants in Ireland and a member of the Institute of Directors, serving on the Professional Development Committee of the latter. She is also a Member of the Council and Court of the University of Ulster where she is Chairman of the Audit Committee. She also Chairs the Invest NI Audit Committee.