• Genivar Inc. of Montreal, which does engineering, surveying, environmental sciences and project management, is paying $431 million in cash for WSP Group plc, which does general building, transportation and industrial work.
• WSP's billings are substantially higher than Genivar's: $1.1 billion in 2010 compared with $572.6 million.
• Genivar's CEO, Pierre Shoiry, will keep that title. The CEO of WSP, Christopher Cole, will be chairman.

WSP launched an aggressive M&A spurt over the last decade, building their U.S. base by acquiring design firms Flack & Kurtz, Cantor Seinuk, Chas H Sells, and Environmental Strategies Consulting.