Avison Young has acquired The Walsh Co. LLC, a multi-service advisory organization specializing in project management services in Boston and throughout the Northeast U.S.

The acquisition further expands Avison Young’s market and business-line coverage in Boston and across the Northeast U.S., according to a statement. The change in ownership will add 53 employees to Avison Young’s operations. Terms of the acquisition were not disclosed.

Effective immediately, Edward S. Walsh (founder and managing principal of The Walsh Co.) and Thomas J. Walsh (managing principal of The Walsh Co.) join Avison Young as principals. They each bring more than 25 years of industry experience to their roles and will be responsible for leading the growth and development of Avison Young’s project management services platform throughout the Northeast.

Effective immediately, Kevin Daly joins Avison Young – New England as a vice president of construction management. Previously, he was the head of The Walsh Co.’s Boston office. Daly will work alongside Sean Beausoleil, principal and director of project management in Boston. Other key professionals joining Avison Young include Mark Sullivan, senior project manager in charge of interior construction, and Isabel Acuna, senior project manager – project management services.

"We have established a track record of success by expanding our footprint in key markets through the strategic acquisition of well-entrenched, dominant firms such as The Walsh Co.," said Mark E. Rose, chair and CEO of Avison Young.

Over the past three and a half years, Avison Young has grown from 11 to 37 offices and from 300 to more than 1,000 real estate professionals across Canada and the U.S., according to a statement.