Tajul undertook his undergraduate medical training at Thanjavur Medical College in India. Following this, he went to the UK to complete his training in Paediatrics. Upon completing his paediatric neurology training in Malaysia, he joined Professor Mink in URMC and Wash U St. Louis (USA) for his training in the field of Paediatric Movement disorders. He is currently practising in KPJ Healthcare hospital as well as a Visiting Consultant to HSI.

He is currently actively teaching in both hospitals.

His main interest is managing children with movement disorders and autoimmune CNS diseases I autoimmune encephalitis

He is currently involved in 3 main research projects:

• Genomics in cerebral palsy
• Genotyping movement disorders among children in Malaysia
• Demyelinating disease spectrum in children