What kind of leader just thinks about "I"? Well, a successful one, it seems.

That's according to Piyush Gupta, the CEO of Southeast Asia's largest bank.

Writing in a recent LinkedIn blog post, the DBS chief said that the course of his 35-year career has caused him to identify the five core qualities that make a great leader — and they all being with the letter "I."

Describing them as his leadership "mantra," the 58-year-old said the "five i's" have become increasingly useful to him at a time when careers are becoming more unpredictable.

"We live in interesting times. With digital disruption, jobs of the future will be vastly different from what they are today," Gupta wrote.

Exactly what they will look like is hard to say, he continued. A recent report from the World Economic Forum suggests that a third of skills required for future jobs are yet to be fully identified. But certain qualities for success will remain constant. Among them, the ability to lead.

"All of us are leaders in our own right," Gupta wrote. "Wherever we are, and whatever we are called to do, if we can exemplify these five qualities, we can make a big difference amid the changes upon us."

Here are Gupta's "five I's of leadership":