SDEM Erectors Nigeria Limited is an energy, industrial and infrastructure construction and fabrication company with its head office in Ikoyi, Lagos, and additional fabrication yards in Trans Amadi, Port Harcourt and Ajaokuta, Kogi State; the firm lists multiple Lagos and Port Harcourt phone lines and a direct email, and it highlights core capabilities across electro-mechanical works, structural steel fabrication and erection, piping, civil works, and operations & maintenance for plants serving power, oil & gas, industrial and infrastructure sectors nationwide.