Aecom Technology Corp on Friday said it plans to buy a Montreal engineering company named RSW for an undisclosed price.

The Los Angeles provider of technical and management services to the transportation, energy, water and government sectors said the acquisition would expand its product offerings and geographical reach. RSW has 550 employees and specializes in hydro power and transmission products in Canada. It had revenues last year of $45 million.

“By welcoming RSW into the Aecom family, we are expanding the growth opportunities for both firms,” Chief Executive John M. Dionisio in a statement. The deal is expected to close in the fourth quarter after the companies obtain shareholder and regulatory approvals.

Shares were up 29 cents, or 1.2 percent, to $24.42 in midday trading on the New York Stock Exchange.