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
- John McHale - A/ Head of Castlebar Municipal District
- Tony Shevlin - Chief Fire Officer
- Padraig Philbin - 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. Ballina Municipal District.
- Paul Dolan - Head of Roads
- Simon Shevlin - Head of Housing
- Declan Turnbull - Head of Ballina Municipal District
- Simon Wall - Senior Architect
- Paul Hyland - Senior Engineer National Roads Office
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 Engagement
- John Magee - Head of Enterprise & Investment
- Anne McCarthy - Head of Strategic Capital Projects
- Austin Vaughan - County Librarian
- Patsy McNulty - Senior Executive Officer Tourism
Catherine McConnell - Director of Services - Planning, Human Resources, Communications, Corporate Affairs. Westport-Belmullet Municipal District.
- Martina Hughes - Head of Corporate Development & Communications
- Síofra Kilcullen - Head of Human Resources & Training
- John McMyler - Senior Planner
- Padraig Walsh - Head of Westport-Belmullet Municipal District
- Elaine Moyles - Head of Property, Internal Audit & Organisational Change
Each Municipal District is represented by a varying number of Councillors (based on the area's population; between 6 and 10 per area).