Public Consulting Group (PCG) has leased 24,764 square feet at 40 Broad St. in Downtown Boston.

The space on the entire fourth floor is an expansion of PCG’s Boston presence. The 286,000-square-foot modern mid-rise office and retail tower at is owned by Pearlmark.

Jones Lang LaSalle Senior Vice President Brad McGill, Executive Vice President Tom O’Regan and Associate Kelly Lockberg negotiated on behalf of Pearlmark Real Estate Partners LLC (formerly Transwestern Investment Co.). Colliers Senior Vice President Leigh Freudenheim and Assistant Vice President Timothy O’Brien represented PCG. Occupancy is scheduled for March 2012.

"With the completion of our significant capital improvements and modernization program, we continue to attract high quality tenants like PCG. We’re thrilled to have them as a tenant, and add them to our impressive roster," said Joseph Concepcion, managing director of Pearlmark.

"The building makes perfect sense for us. It gives us a central location in close proximity to our corporate headquarters at 148 State St., in a vibrant neighborhood. 40 Broad St. supports our future growth plans here in Boston," said Debbie Clark, manager of PCG.

Other tenants at 40 Broad St. include Mullen Communications, Advent Software Inc., and Gesmer Updegrove.