TRO achieved a turnover of £24.12m in 2012, compared to £25.5m in 2011, with gross profit at £9.74m the year.
Meanwhile, post-tax profit fell to £1.86m, from £2.06m in 2011, due to what TRO managing director Rob Allen called an anomalous year.
He told C&IT: "Due to the Olympics a lot of our regular event activity was disrupted. We were very busy setting up offices in countries including China and Australia, which will lead to a boost in 2013."
Allen added that 2011 was an unusually bouyant year for business.