Patrick Joy has been named Ernst and Young Entrepreneur of the Year.
Mr Joy founded Suretank Group in 1995. The company is based in Dunleer in County Louth and is the world's biggest manufacturer of cargo-carrying units for the offshore oil and gas industry.
The company, which started with 14 employees nearly 20 years ago, now employs 600 and has offices across the world.
It generates annual revenues of almost €70m.