His multi-cultural academic and social background has resulted in Seng Giaw being fluent in Mandarin, English, Bahasa Malaysia, and competent in the writing of Malay in the Jawi script.
His social activities include the office of Pengerusi Kehormat of Persatuan Murid-murid Tua, Chung Ling for the states of Selangor, Negeri Sembilan, Pahang and Kuala Lumpur.
Over the years, Tan has gathered a wide portfolio of medical experience, having worked at various hospitals (both international and local), private practice clinics and a short period in the Royal Malaysian Army.
[1] Despite having been successful elected as the Member of Parliament (MP) of Kepong for eight consecutive terms (from 1982 to 2018), Tan was dropped as a candidate of choice for the party in GE14.
This was amid the rumours nearing the GE14, and Tan's action who went on the offensive by declaring 'he will not back down' and began releasing a series of press statements[2] including a veiled attack on DAP party leaders through an interview with Malaysian Chinese Association (MCA)'s controlled newspaper, The Star[3] as well as UMNO controlled, New Straits Times[4] which labeled them as 'not as honest as the late Tan Chee Koon'.