I am a mechanical engineer with most 13 years work experience  in oil , gas , petrochemical & power plant unites in fields planning , design ,percommission , commission , mechanical completion & executing special fabrication & erection  mechanical equipment and mechanical system (transmission and production platform , drilling platform, tower , tower crane , steel structure ,engine ,vessel , heat exchanger , air cooler , boiler ,fired heater , drum , pump, blower, compressor , extruder …..) and piping ( all materials : cs , ss ,as, gal….) , and too welding inspection(TIC ,MIC,SMAW) ….