• M3 Mulhuddart Services
• MACE Ireland
• MPA Recruitment
• MYM Recruitment
• Majorel Ireland
• Maldron Hotels & Partners
• Malwarebytes
• Mane Contract Services Limited
• Manguard Plus
• Mannings Bakery
• Markree Castle Hotel
• Marlfield House
• Marqette Restaurant Dublin Airport

• Marymount University Hospital & Hospice
• Matchtech
• Mater Misericordiae University Hospital
• Mazars
• McCabes Pharmacy
• McCauley Health & Beauty Pharmacy Ltd
• McCulla Transport
• McDonald’s Restaurants of Ireland
• McKesson Ireland
• McSport
• McWilliam Park Hotel
• Meagher's Pharmacy
• Mercantile Group Bar

• Merchants Quay Ireland
• Merco
• Mercy University Hospital
• Merit Medical Systems
• Mespil Hotel
• Metro Hotel Dublin Airport
• Michael Murphy Home Furnishing
• MicroTECH Global
• Microchip Technology
• Midleton Park Hotel
• Miller Hospitality
• Molloys Bar & Grill Tallaght (Foxes Cover)
• Molson Coors Brewing Company

• Monaghan Mushrooms
• Monasterevin Motors
• MongoDB
• Monroe Recruitment
• Moore Cleaning Services
• Moriarty Group
• Morrison Hotel
• Morson Group
• Mountain Warehouse GB
• Moxy Hotels (Marriott International, Inc)
• Mr Price Branded Bargains
• Muiriosa Foundation
• Myhomecare