Pre-tax profit grew from £1.2m in 2008 to £3.6m in 2009.
TRO managing director Keith O’Loughlin said the main reason for the growth was the inclusion of events company Exentio, which was merged with TRO in 2008, in the financial report for the first time.
"In 2009 we had the first full trading year with Exentio as part of TRO and that gave a lift to turnover and some operational efficiencies across the company," said O’Loughlin. "It enabled TRO to grow in terms of sales and profit during 2009, which was a harsh trading year for the entire industry. The rest of it was down to a very focused new business drive."
TRO is expecting "modest growth" in 2010.
"The events market is improving from a base that took a huge shock in late 2008," said O’Loughlin.