Mr Tan Tiong Jin Clifton qualified with the Association of Chartered and Certified Accountants (ACCA) in 1980. He was subsequently conferred with the Fellowship from the ACCA (FCCA) in 1986. He has been a member of ICPAS (renamed Institute of Singapore Chartered Accountants) since 1985.

Mr Tan started his career with the public accounting firms of Ernst and Young and PwC before becoming Group Finance Manager at Scott Paper Singapore. He was headhunted to start up the Estee Lauder Companies in Singapore where he served in different capacities for 27 years before leaving the organisation as concurrently its Director, Finance & Administration, and Regional Finance Director for the Asia Pacific Travel Retailing operations. Mr Tan was previously on the Board of the Health Sciences Authority of Singapore and was formerly the Chairman of the Chen Su Lan Methodist Children's Home where he presently serves as Honorary Member.