KARACHI (PR) - Irfan K Qureshi has assumed the charge of Managing Director PSO, replacing Kalim A Siddiqui. Qureshi has a vast and extensive experience of over 30 years in sales, marketing, logistics, customer services, policy formulation, public and government relations in oil and telecom sectors. He started his career with Chevron in 1977 and then went on to work for Exxon Fertilizer in Pakistan serving in different cities of the country. Later, he got associated with the telecommunication industry in Pakistan. This was followed by serving Cable and Wireless PLC in Pakistan as Director Marketing External Affairs. Qureshi rejoined Chevron in 2001 where he worked as General Manager for Policy, Government and Public Affairs for Pakistan, Egypt and Mauritius.