The company saw double digit year-on-year revenue growth in every quarter of 2010.
Key accounts, such as Thames Water and Heathrow Airport, grew 25% year on year and now comprise 30% of total revenue.
Chief executive Chris Davies said: “Our growth in key accounts has been significant in 2010 in our target sectors of facilities management, airports, retail and utilities.
“Our strategy throughout has been to focus on the highly demanding maintain and operate segment rather than ground up construction.
“We remain a very focused business concentrating on stable parts of the market that afford better growth prospects in these difficult times.”
The company's health and safety training arm grew by more than 50% during the year, in part through the acquisition of Derby-based Hydrex Training.
Mr Davies said that that market conditions would continue to be "challenging" in 2011, but said HSS would continue to invest in training apprentices, improving its fleet and logistics networks and on keeping its costs down.
Chairman Archie Norman, the former Asda boss, added: "The HSS team under Chris Davies’ strong leadership has delivered another year of change and growth despite very challenging market conditions. "This demonstrates that our model of focus on customer service built around a unique network of large branches and fully integrated logistics is capable of delivering real competitive advantage and better results for customers.”
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