Other winners during the glittering Consultants Awards ceremony at London's Claridge's hotel last Friday included Colin Buchanan in the medium-sized firm category for its work on Crossrail, and international consultant of the year Mott MacDonald which showed record global growth of 20% last year.
In addition Sarah Royse of Inbuilt was named Young Consultant of the Year and the special projects team within Parsons Brinckerhoff's bridges group picked up the Outstanding Achievement Award for its work in developing Fibre Reinforced Polymer bridges.
WYG scooped the major prize for tackling climate change and the skills shortage head on, during a year when it saw a record 24% growth in fees.
"White Young Green has clearly had a great year as evidenced by its organic and acquisitional growth and its huge range of projects," said NCE editor Antony Oliver.
WYG's updated graduate development programme has helped the firm bring in 600 new recruits in the last 12 months.
Also new for 2007 was WYG's move to gather a dedicated team of sustainability experts and its launch of WYG Energy, a division focused on sustainable energy management.
WYG beat a shortlist of contractor-turned-consultant Amey, Halcrow, Mott MacDonald, Mouchel and WSP to the major firm prize.
The awards are jointly organised by NCE and the Association for Consulting Engineers and sponsored by Griffiths & Armour, BST Global, Hays Consulting Engineering and Kennedys.