As Vice President of Energy and Sustainability for WinnCompanies, Darien is responsible for managing a range of energy efficiency projects and sustainability programs across Winn’s portfolio of residential properties. Recent greening efforts include the installation of 964 Kilowatts of solar photovoltaic, numerous HVAC and insulation upgrades, water conservation improvements, and extensive training for Winn management and maintenance staff. In addition, WinnResidential has developed a comprehensive Green Operations Manual to integrate sustainability across multiple properties. Through Mr. Crimmin’s leadership, Winn has partnered with numerous local, state, and federal agencies to reduce energy costs and promote investments in sustainability. Winn’s latest projects include two landmark green developments in Boston: Castle Square’s Deep Energy Retrofit (www.castledeepenergy.com) and Oliver Lofts historic mill conversion. Castle Square is the largest residential deep energy retrofit in the United States, with forecasted energy savings well over 50% compared to pre-retrofit levels. Prior to joining WinnDevelopment in 2009, Mr. Crimmin was responsible for managing Harvard University’s Office for Sustainability Green Building Services. Among other accomplishments, Mr. Crimmin helped develop Harvard’s largest solar hot water installation, designed training modules for Harvard University’s Operations Services, and created utility measurement tools to track energy performance across the University. Additionally, Mr. Crimmin was a teaching fellow at Harvard University’s Extension School for Green Buildings: Design, Construction, and Operations.