Tan Sri Ab. Rahman bin Omar graduated with a Bachelor of Economics (Hons) from the University of Malaya. He served in various departments during his stint with the government. He handled the Administration and Diplomatic Services for the Statistic Department, Ministry of Commerce & Industry and the Ministry of Primary Industry from 1970 to 1973. He then joined the Pineapple Cannery of Malaysia Sdn. Bhd (PCM) as the Finance and Admin Manager in 1973 and was promoted as the General Manager, a position he occupied from 1974 till 1980. Between 1980 to 2004, he served on the board of various organizations, including PCM, Perusahaan Sadur Timah Malaysia (Perstima) Berhad, Edaran Otomobil Nasional (EON) Bhd, Perusahaan Otomobil National (Proton) Bhd, Perusahaan Otomobil National Kedua Sdn. Bhd (PERODUA) and Gamuda Berhad. He is presently the Director of Wah Seong Corporation Berhad and the Chairman of Perstima Berhad.