• J A Boland Group (Boland Motor Group)
• J&S Automotive
• JD Sports Fashion Plc
• JD Sports Ireland
• JD Wetherspoon
• JJ Rhatigan & Company
• JJ Rhatigan Building Contractors
• JLL - Global Commercial Real Estate Services
• JWR Employment Specialists
• JYSK Ireland Ltd

• Jabil Inc
• Jack & Jones
• Jack Jordans
• Jackson's Hotel & Leisure Centre
• JacksonStone Recruitment
• Jacobs Engineering Group Inc
• Jaguar Land Rover
• James Whelan Butchers
• Jazz Pharmaceuticals
• Jefferson Frank

• Jigsaw – The National Centre for Youth Mental Health
• JobContax Recruitment Agency
• Joe Duffy Group
• John Paul Construction
• John Sisk & Son
• John Wood Group PLC (Wood Group)
• Johnson & Johnson
• Johnson & Perrott Motor Group
• Johnson Controls, Inc.
• Johnstown Estate Hotel & Spa

• Johnstown Garden Centre
• Join Talent
• Jones Engineering
• Jpmorgan Chase
• Jump Juice Bars Ltd
• Junction 14 Mayfield
• Jurys Inn Hotels Group
• Just Eat