28. McAleer and Rushe
- Managing director: Martin Magee
- Pre-tax profit: £13.4m
- Employment: 300
- Pay bill: £18.6m
McAleer and Rushe is based in Cookstown with offices in London, Dublin and Belfast.
The company employs 300 people in the UK and Ireland and celebrated 50 years in business last year with an expected £300m of design and build turnover.