Our OFTEC-certified engineers work across residential, commercial, industrial, and defence sectors to provide fully compliant, high-quality solutions. Our Services Include: Oil Tank Installation & Services – OFTEC, Fuel Tank Installation & Services, Tank Cleaning & Degassing, Tank Decommissioning & Removal, MTFI, BFI, POL & Fuel Oil Services – MOD & Defence, Pipework & Tank Equipment, Tank & Equipment Survey & Reports, Contaminated Fuel Oil & Tank Uplifts, Tank Testing & Maintenance. Why Choose OTIS? OFTEC-certified engineers; Nationwide service & rapid response; Full compliance with UK regulations; End-to-end project management.