Link-Nilsen Corporation is a fire sprinkler contractor based in Arcadia, California, founded in 1972. It designs and installs fire protection systems for aerospace, institutional, education, transport and water treatment clients across Southern California. Its projects include Los Angeles metro stations and university buildings. The company holds a California C-16 Fire Protection Contractor licence and a General Building Contractor licence, and its design staff include NICET Level IV and Level III certification in water-based fire protection systems.