Review mechanical activities throughout project life cycle based on project's contract, agreements, technical specification, Mechanical standards and codes. as follows;1. Reviewing shop drawings, design calculations, and approval requests of mechanical material (submittals) , that have been submitted from contractor.. 2. Supervision of work done in sites by contractor. For Mechanical systems as follows • HVAC system. • Firefighting system. • Plumbing system. • Medical gas system. • LPG piping system• Fuel Oil piping system3. Reviewing invoices and the work done list by contractor.