Swansea contractor Dawnus Construction has revealed that profits for last year exceeded £3 million.
The firm posted pre-tax profits for the year to 31 December 2010 of £3.15m - up from £590,000 in 2009.
Turnover was up from £72m to £77.5m, with the firm saying 2010 had been a landmark year.
Dawnus Construction finance director Wayne Jones said: “We have worked hard to maintain our success in difficult trading conditions and in recent months we have been able to return to creating job opportunities for people in Wales.
“We are confident that we can carry this success forward into 2011.”
The firm currently employs 50 people, however it is working on an extension to its office in a bid to accommodate future growth.
Work is getting underway at the site at the Riverside Business Park in Swansea Vale.
Meanwhile, the firm has been offered further work on a scheme creating a logistics corridor connecting an iron mine in Sierra Leone with a port.