Riverside, a private investor focused on the smaller end of the middle market, completed the investment in Eastman Fire Protection, a fire protection business. Financial terms were not disclosed. “The Eastman add-on is consistent with Riverside’s investment strategy of aggressively growing the CertaSite platform through add-on acquisitions. With a well-established customer base and reputation for high-quality services, Eastman is a perfect fit for CertaSite," Loren Schlachet, Riverside Managing Partner.