Keystone Capital Announces Israel Berger & Associates Transaction
April 2011

NEW YORK, April 18, 2011 – Israel Berger & Associates LLC (IBA), a leading consulting and inspection group specializing in building envelope technologies, announced a merger with Viridian Energy & Environmental LLC (Viridian), a leading consulting group specializing in energy efficiency and environmentally responsible design/construction.  “We are very excited about this merger with Viridian.  This is the first step in our strategy to build the leading building services consulting firm.  The combination of IBA and Viridian allows us to integrate our shared expertise in building envelope, energy efficiency, and building commissioning to offer a holistic approach to our customers in these building sciences,” says Israel Berger, President of IBA. IBA has been a partner company of Keystone Capital, Inc. since a 2006 recapitalization.

Building designers, developers, owners, and managers will benefit from the combined firm’s technical proficiency in primary building systems that impact energy usage and building operations.  Adrian Tuluca, Principal of Viridian Energy & Environmental, offered the following statement: “There is tremendous synergy between energy, green and commissioning; traditionally Viridian’s services, and envelope consulting; traditionally IBA’s services. Both firms have long recognized that fragmentation of these services creates difficulties in achieving optimum results during design, construction and post-occupancy. We are happy to be now part of a larger, integrated group and look forward to delivering to our clients a higher level of integration and quality.”

Israel Berger and Marc Weissbach will continue in their positions of President and COO, respectively, of IBA. Adrian Tuluca will remain the Managing Principal of the combined energy consulting and commissioning practice and will join the Board of IBA.  Viridian’s Associate Principals will join IBA’s senior management team and all Viridian employees will remain with the company as part of the transaction. The combined company will employ approximately 120 employees and be headquartered in New York City with offices in Connecticut, Massachusetts, Florida, Nevada, Missouri, and California. For more information, visit IBA’s website at and Viridian’s website at

IBA’s vision is to execute a “roll up” strategy within the building sciences industry that will ultimately reduce gaps within the complex, fragmented specialty consulting industry and offer clients the ability to have a single leader manage related services, thereby ensuring technical excellence, integration, and consistency of delivery. Keystone Capital continues to seek independent, third party providers of architectural or building engineering consulting services with greater than $5 million of revenue as add-on acquisition/growth strategy targets for IBA. Please contact one of the Keystone team members below with any opportunities that might be a fit as a part of this strategy.

Contact Information

Scott Gwilliam
(847) 236-5351

Jason Van Zant
(847) 236-5354