“There can be little doubt that the economic downturn has hit smaller firms the hardest,” says the award citation from respected industry monitor New Civil Engineer. “Times are tough for the likes of I & H Brown – but the firm has been quick thinking and flexible in its approach to winning new work.”

It says the Perth-based firm, which turned over £37m last year, was once seen as a bulk earthworks contractor with a niche in contaminated land remediation. “I & H Brown has evolved considerably over the past 10 years – and without losing sight of its core strengths.

“The approach is paying dividends, because the firm is operating on a good margin and has plenty of work in its order book.”

Last week Brown reported installing its 100th machine on the site of the M80 extension, where accepting sub-contractor status enabled it to win its biggest ever contract.

Roger Philpott, contracts director, said the firm had broadened the scale of its projects, without losing its distinctive style and values. “We have strengthened our links with our supply chain and have looked at forming joint ventures with other contractors, where we believe our particular strengths can add value to a bid.

“Although our normal role is principal contractor, we have been prepared to work as a sub-contractor when circumstances are appropriate.”

Last Friday, Brown completed work on a £12m velodrome contract at Parkhead in Glasgow, carrying out the first major enabling works project for the 2014 Commonwealth Games.