Dato Ir. Jamaludin started his career as a civil engineer with the Development Authority of Pahang Tenggara in 1979 and subsequently, with Dewan Bandaraya Kuala Lumpur. In 1981, he joined Petroliam Nasional Berhad (PETRONAS) as a Project Engineer, after which he spent 19 years at Syarikat Perumahan Pegawai Kerajaan (SPPK).
This served as a platform for him to nurture his marketing and management skills, which led to his appointment as the Managing Director of SPPK in 1999, and eventually as Group Managing Director of renowned Island & Peninsular Berhad, a property developer, in 2005. He retired from this position on 30 April 2017.