Leadership Team

The HYM team collectively has over 70 years of experience in all aspects of commercial and multi-family real estate and is currently developing, managing, and leasing over 9 million SF of mixed-use, commercial, multifamily and retail projects in Boston, Cambridge, and Somerville.


Thomas N. O'Brien



Mr. O'Brien previously served as a Managing Partner for JPI, a national owner of multifamily communities, and as a Managing Director in Boston and New York for Tishman Speyer, one of the world’s leading real estate firms. O'Brien also led the Boston Redevelopment Authority as its Director and Chief of Staff, overseeing the development of over 12 million SF of projects in Boston, from 1994 to 2000. He served as the General Counsel and Director of Finance at the Massachusetts Industrial Finance Agency from 1989 to 1994. He began his career as an investment analyst with the American International Group (“AIG”) in New York. O'Brien has served as Chairman of The Greater Boston Real Estate Board and currently serves on the Board of the Taubman Center for State and Local Government at Harvard University and as Vice Chair of the Board of Overseers of The Anti-Defamation League of New England. In 2011, the Governor of Massachusetts appointed Mr. O’Brien to the Board of the Massachusetts Housing Finance Agency. In 2016, Mayor Martin J. Walsh appointed O’Brien to the Board of Trustees of the Rose F. Kennedy Greenway Conservancy.  O’Brien is a graduate of Brown University and Suffolk University Law School, and is a member of the Massachusetts Bar.


Paul Crisalli, PE, LEED AP



Mr. Crisalli has over thirty-seven years of real estate development and operations experience in commercial and multifamily properties. Mr. Crisalli previously served as Operations Partner and Senior Vice President for JPI where he was directly responsible for all development and investments in the New York Region and oversaw the design and development of multifamily projects in JPI's Northeast Region. Prior to JPI he served as Managing Director of the Halpern Real Estate Development Company and previous to that as Director of Construction and Development of the Halpern Building Corporation. He is a member of the National Society of Professional Engineers and a member of the US Green Building Council. Mr. Crisalli has also served as Chair, and former Executive Board Member, of the Westchester/Fairfield District Council of the Urban Land Institute. Mr. Crisalli is a graduate of Polytechnic Institute of Brooklyn and is a Professional Engineer


Douglas J. Manz



Mr. Manz previously served as a Development Partner for JPI and Vice President of Development for Northland Investment Corporation where he focused on the permitting and development of high-rise, mid-rise and low-rise multifamily projects. Prior to that, he held various positions with Leggat McCall Properties in Boston. In 2013, Mr. Manz was appointed to and served on the City of Cambridge Transportation Advisory Committee and is a member of ULI and NAIOP. Mr. Manz is a graduate of Cornell University and the Harvard University School of Design.