The management team led by managing director Nick Coley bought Fitzgerald from parent company Thomas Vale, now part of Bouygues.
Managing Director Nick Coley said that Fitzgerald has thrived on the freedom and flexibility that its new ownership structure allowed lifting turnover 50% to £27m in the year to March.
The contractor delivered a pre-tax profit of £775,000 and has increased its cash reserves to more than £5m.
Several contract wins gives Fitzgerald a secured forward order book of £18m, more than 60% of targeted turnover for 2014/15.
Coley said: “Our Clients have been extremely supportive throughout this period of change and the financial performance of the company has exceeded all of our expectations.
“Client Satisfaction is critical to the on-going success of the business as we continue to secure 80% of our turnover through repeat business.”