David Greaney is the Chief Executive Officer of Synergy, a Boston-based real estate investment and management company, that he founded in 2003. Synergy owns and operates over 30 commercial assets in the Greater Boston area, totaling nearly 6.6 million square feet. Over 500 companies, retailers, and organizations occupy space in the Synergy-owned portfolio.
Greaney has played a pivotal role in shaping Boston’s economy and downtown landscape, leading transformative acquisitions such as 99 High Street, 101 Arch, 1 Liberty, 179 Lincoln, and 1 India Street. His vision for integrating investment, management, leasing, construction, property management, and hospitality has positioned Synergy as a leader in delivering tenant-focused, amenity-driven spaces that consistently outperform market benchmarks.
Beyond commercial real estate, Greaney is deeply invested in Boston’s hospitality scene, with ownership in over a dozen restaurants that bring vibrancy, foot traffic, and jobs to the city’s core. He also works closely with Governor Healey to address Massachusetts’ housing crisis, focusing on adaptive reuse and administration opportunities.
Active in civic and industry leadership, Greaney serves on the boards of NAIOP Massachusetts and the Downtown Boston Alliance, while also championing diversity, equity, and inclusion through initiatives like ULI’s CREST program. Since relocating from Ireland in 1995, he has raised millions for philanthropic causes on both sides of the Atlantic, including Bridge Over Troubled Waters and The Ireland Funds. Greaney has received many accolades for his leadership in Boston – including being recognized for two consecutive years in the Boston Business Journal’s Power50 List. Under his leadership, Synergy has been received the Commercial Broker’s Association Landlord of the Year Award, and Development & Investment Firm of the Year from Boston Real Estate Times.
Greaney is a graduate of the University College Dublin. Prior to founding Synergy, Greaney worked at Harvard Management Company and PricewaterhouseCoopers (PwC). Greaney resides on the South Shore of Massachusetts with his wife and seven children. In his free time, he enjoys traveling and golf.