Thanh was chairman of PetroVietnam Construction Joint Stock Corporation until 2013, when he was appointed to several senior government positions, including vice chairman of Hau Giang province in the southern Mekong Delta.
Thanh oli PetroVietnam Construction Joint Stock Corporationi esimees kuni 2013. aastani, mil ta nimetati valitsuses mitmele vanemametikohale, sh Hau Giangi provintsi aseesimeheks lõunapoolses Mekong Deltas.