Dan Collins, Greg Tanner and Christina Lambertson have joined Avison Young in Boston.

Effective immediately, Collins joins as a senior vice president, Tanner as senior associate and Lambertson as administrative coordinator. They will focus on landlord and tenant representation in the downtown Boston office market. All three join Avison Young from NAI Hunneman, a full-service real estate brokerage in Boston.

"We are pleased to welcome Dan, Greg and Christina to Avison Young," Rick Kimball, Avison Young principal and managing director, said in a statement. "Their experience and industry knowledge, especially of the downtown market, will be invaluable to our downtown team. The relationships that Dan and Greg have developed with clients and other industry contacts over the years will be of great benefit to Avison Young as we continue to expand our footprint in Boston and the rest of New England."

Collins brings nine years of commercial real estate experience with a focus on the downtown Boston market. Prior to joining Avison Young, he was a vice president at NAI Hunneman.

Tanner, who has eight years of commercial real estate experience, was a member of NAI Hunneman’s downtown team, focusing his efforts on landlord and tenant representation in the Boston market. He previously worked at Trammell Crow, where he represented a variety of clients throughout Greater Boston.

Lambertson previously worked as a marketing assistant at NAI Hunneman, where she provided administrative support, graphic design and production coordination for a team of Boston and Cambridge office brokers.