Until 2016, he was also the Group Chief Executive of Dialog Axiata PLC,[1] Sri Lanka’s largest mobile communications provider.

Wijayasuriya joined Dialog Axiata, the fourth entrant to Sri Lanka’s mobile market as a member of the founding management team in 1994.

In 2016, the GSM Association named Hans as the first recipient of the “Outstanding Contribution to the Asian Mobile Industry” Award.

Wijayasuriya is a past chairman of the Ceylon Chamber of Commerce and a member of the board of directors of John Keells Holdings PLC.

Hans has published on the subject of digital mobile communications (S.S.H Wijayasuriya et al.), including research papers in publications of the Institute of Electrical and Electronics Engineers (IEEE) USA, Royal Society and the Institute of Electrical Engineers (IEE) UK.