Reliance Commercial Associates (RCA) was established by Mr. Muhammad Shahid Hasan on 23rd August 1973, as a sole proprietorship. In the initial years the main focus of the organization was on specialized process Air-conditioning from Germany, including planning, designing and execution of central Air conditioning projects up to the magnitude of 1500Tons Capacity, for Textile and chemical Fibre industries. Being authorized representatives for Trane and Krantz TKT Germany (currently known as Caverion). The company delivered turnkey project solutions which included Engineering, Designing, Planning, providing system/equipment, installation, start up and after sales
In 1980 RCA diversified towards the field of Aviation, focusing on marketing and business development, by the year 1985 it had well established a name in the aviation industry with European and American manufacturers in its portfolio and its existence within the customer market in Pakistan.