This firm has benefited from the influx of US firms to Ireland. Working mainly in Dublin, the construction contractor provides clients such as Oracle and IBM with upgrades to their office buildings. It claims to have 93% repeat business, helping international sales hit £94.7m in 2017. Mac is led by founder and managing director Paul McKenna, 50, and is based in Newry, Northern Ireland.

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Company details
Year2018
Rank65
Companymac-group
ActivityConstruction and fit-out
LocationCounty Down
2-yr av intl sales growth pa60.89%
International sales £000s94,724
Total sales £000s94,724
Staff83
Founded2002
Websitewww.mac-group.com

If applicable:

* Supplied by company † Annualised figure