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