Kevin Kelly - Chief Executive
John Condon - Director of Services - Water Services, Environment Climate Change & Agriculture, Emergency Services and Elections. Castlebar Municipal District.
- Ann Moore - Head of Environment, Climate Change, and Agriculture
- David Mellett - Head of Castlebar Municipal District
- Tony Shevlin - Chief Fire Officer
- Michael McDermot - A/ Head of Water Services
Peter Duggan - Director of Finance - Financial Management, Information Systems and Motor Taxation
- Tracy Flanagan - Management Accountant
- Olivia Heffernan - Financial Accountant
- Deirdre Lavelle - Head of Information Systems
Tom Gilligan - Director of Services - Housing, Roads, Architectural Services and Services Development. Claremorris Swinford Municipal District.
- Paul Dolan - Head of Roads
- Padraic Flanagan - Head of Claremorris-Swinford Municipal District
- Simon Wall - Senior Architect
- Paul Hyland - Senior Engineer National Roads Office
Joanne Grehan - Director of Services - Enterprise & Economic Development, Community Engagement, Tourism & Leisure, Marine, Town Centre First, Library Service. Westport Belmullet MD.
- Seamus O'Mongáin - Head of Westport-Belmullet Municipal District
- Deirdre Finnerty - Head of Community Engagement
- John Magee - Head of Enterprise
- Anne McCarthy - Town Regeneration Officer
- Tia Crowley - Head of Tourism
- Michael O'Boyle - Head of Marine
- Austin Vaughan - County Librarian
Catherine McConnell - Director of Services - Planning, Human Resources, Communications, Corporate Affairs. Ballina Municipal District.
- Martina Hughes - Head of Corporate Development & Communications
- Declan Turnbull - Head of Ballina Municipal District
- Síofra Kilcullen - Head of Human Resources & Training
- John McMyler - Senior Planner
- Julianne Gavin - Head of Property, Organisational Change and Internal Audit
- Pat Staunton - Capital Delivery Unit
Each Municipal District is represented by a varying number of Councillors (based on the area's population; between 6 and 10 per area).