Having achieved his goal of making Krungthai Bank (KTB) the biggest lender in Thailand by assets in 2015, Vorapak Tanyawong is confident the state-owned bank can go on to overtake its rivals on profitability by 2018.

"The first summit, which means to complete all key foundations, starts from 2014. The second summit from 2016-2018 [aims] to close the gap with our peers in terms of margin and net yield growth. Based on our progress over the past three years, I'm quite confident [of achieving our target]," the CEO and president of KTB told CNBC's "Managing Asia."