The deadlock ransomware group listed donjon on its data leak site on 2026-06-15. Country: SG Sector: Professional Services Domains named: donjon.com.sg Claim as published on the leak site: Donjon Pte Ltd a trusted provider of mechanical and electrical (M&E) engineering services based in Singapore. Established in 2003, the company is a registered contractor with the Building and Construction Authority (BCA). They cater to commercial, industrial, and residential sectors.