• M3 Mulhuddart Services
• MCR Group - MCR Outsourcing
• MCS Group
• MSL Engineering Limited
• MTM Engineering
• Manguard Plus
• Mannings Bakery
• Manpower Ireland
• Manpower UK
• ManpowerGroup Inc
• Maria Logan Recruitment
• Markree Castle Hotel
• Marlfield House

• Marqette Restaurant Dublin Airport
• Marriott International, Inc
• Marsh & McLennan Companies, Inc
• Mastercard
• Matchtech
• Mater Misericordiae University Hospital
• MathWorks
• Matrix Recruitment Group
• Mattinson Partnership
• Maxi Zoo (Fressnapf Group)
• Mazars
• McCabes Pharmacy
• McCulla Transport

• McCurrach
• Meagher's Pharmacy
• Mercer LLC
• Mercy University Hospital
• Merit Medical Systems
• Merrion Hotel
• Mespil Hotel
• Michael Murphy Home Furnishing
• Michael Page
• MicroTECH Global
• Midleton Park Hotel
• Mitie Group PLC
• Molloys Bar & Grill Tallaght (Foxes Cover)

• Monaghan Mushrooms
• Monasterevin Motors
• Monroe Recruitment
• Morgan McKinley
• Morrison Hotel
• Morson Group
• Mount Juliet
• Mount Wolseley Hotel Spa & Golf Resort
• Mountain Warehouse GB
• Muiriosa Foundation
• Murdock Builders’ Merchants Limited
• Murphy & Sons Limited
• Musgrave Group plc