Adj Asst Prof Chan Peng Chew Mark is Senior Consultant in Department of Geriatric Medicine, Tan Tock Seng Hospital. He serves as the Chairman, Medical Board in NHG Population Health.

He has his subspecialty interest in dementia and cognitive disorders in the elderly.

He involves in medical education and has appointment of Adj Assistant Professor (Adj Asst Prof) in the Yong Loo Lin School of Medicine National University Singapore. He also serves as clinical expert for Geriatric Education and Research Institute.