He contested in the 2011 Tamil Nadu Legislative Assembly election as a Desiya Murpokku Dravida Kazhagam (DMDK) candidate and won from his Virdhunagar constituency.

Again he contested in the 2016 Tamil Nadu Legislative Assembly election as an All India Anna Dravida Munnetra Kazhagam (AIADMK) candidate and won from his Avadi constituency.

[3] After graduating from XLRI in 1984, he joined the Indian operations of an industrial gas multi-national BOC Group and later Deutsche Babcock.

[3][4] In 1992,[3][5] he co-founded Ma Foi Management Consultants along with his wife, to tap into opportunities arising out of the 1991 economic liberalisation policy in India.

The initial focus of Ma Foi was placing middle-level and managerial people overseas, especially in the West Asia.

[11] CIEL HR focuses on talent acquisition for companies and flex staffing using modern analytical tools.

[16] On 21 August 2017, with the merger of AIADMK factions headed by Edappadi K. Palaniswami and O. Panneerselvam, Pandiarajan was again sworn in as a cabinet minister with portfolios of archaeology, Tamil language and Culture.