The sinobi ransomware group listed J Derenzo on its data leak site on 2025-08-14. Country: US Sector: Professional Services Domains named: jderenzo.com Claim as published on the leak site: J. Derenzo Co. has been one of New England’s premier site work contractors for over 75 years. The team’s experience ranges from large scale rural site clearing to some of the most complex, tight-site, deep hole excavations in downtown Boston. Our diversity of expertise has been a key driver in amassing a portfolio of work that is second-to-none in the industry.