Peter Hynes - Chief Executive
Peter Duggan - Director of Finance: Management of Council Finances, Debt Management, Motor Taxation, and Strategic Investment
- Tracy Flanagan - Management Accountant
- Olivia Heffernan - Management Accountant
John Condon - Director of Services Water Services, Environment Climate Change & Agriculture and Emergency Services
- Iarla Moran - Head of Castlebar Municipal District
- Marie Crowley - Head of Water Servcies
- Martin Keating - Head of Environment, Climate Change, and Agriculture
- Tony Shevlin - Acting Chief Fire Officer
Tom Gilligan - Director of Services Housing, Roads, and Services Development
- Declan Turnbull - Head of Ballina Municipal District
- Simon Shevlin - Head of Housing
- Paul Dolan - Head of Roads
Catherine Mc Connell - Director of Services Planning, Human Resources, Communications, Information Systems, Corporate Affairs, and Architectural Services
- Padraig Walsh - Head of Westport-Belmullet Municipal District
- Síofra Kilcullen - Head of Corporate Services & Human Resources
- Beatrice Heneghan - Head of Information Systems
- Simon Wall - Senior Architect
- Austin Vaughan - County Librarian
- Martina Hughes - Head of Communications
- John McMyler - Senior Planner
John Magee - Acting Director of Services Enterprise, Community and Economic Development, Tourism
- Padraic Flanagan - Head of Claremorris-Swinford Municipal District
- Elaine Moyles - Acting Head of Enterprise
- Liam Hanrahan - Head of Community
- 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 7 and 8 per area).