Peter Duggan - Chief Executive (Interim)
Tom Gilligan - Finance, Roads and Services Development. Ballina Municipal District.
- Declan Turnbull - Head of Ballina Municipal District
- Paul Dolan - Head of Roads
- Tracy Flanagan - Management Accountant
- Olivia Heffernan - Financial Accountant
- John Maughan - Procurement Officer
John Condon - Director of Services Water Services, Environment Climate Change & Agriculture, Emergency Services and Elections. Castlebar Municipal District.
- Iarla Moran - Head of Castlebar Municipal District
- Patsy McNulty - Head of Water Services
- Martin Keating - Head of Environment, Climate Change, and Agriculture
- Tony Shevlin - Chief Fire Officer
Catherine Mc Connell - Director of Services Planning, Human Resources, Communications, Information Systems and Corporate Affairs. Westport-Belmullet Municipal District.
- Padraig Walsh - Head of Westport-Belmullet Municipal District
- Síofra Kilcullen - Head of Corporate Services & Human Resources
- Danny O Toole - Head of Digital Transformation
- Beatrice Heneghan - Head of Information Systems and Innovation
- Austin Vaughan - County Librarian
- Martina Hughes - Head of Communications
- John McMyler - Senior Planner
- Tanya Whyte - Head of Property
Simon Shevlin - Acting Director of Services Housing and Architectural Services
John Magee - Acting Director of Services Enterprise, Community and Economic Development, Tourism. Claremorris-Swinford Municipal District.
- Padraic Flanagan - Head of Claremorris-Swinford Municipal District
- Elaine Moyles - Acting Head of Enterprise
- Deirdre Finnerty - Head of Community & Integrated Development
- Padraig Philbin - Head of Tourism, Recreation & Amenity
Each Municipal District is represented by a varying number of Councillors (based on the area's population; between 6 and 10 per area).