Enlightened leadership would be conducted by a leader, who is enlightened; but what is enlightenment? In a conversation with philospher Ken Wilber, and Andrew Cohen,founder of What Is Enlightenment?, says the following:

Eventually, I started to call this teaching "evolutionary enlightenment" or "impersonal evolutionary enlightenment." In this teaching, there is an emphasis not only on the realization of emptiness and pure Being but also on the need to become a radically and profoundly transformed human being who is going to be able to manifest our higher evolutionary potential in the world. I'd never really come across anything like this before. It was only recently, when I came upon the teachings of Sri Aurobindo and Teilhard de Chardin in our research for the magazine, that I started to hear echoes of my own passion—a passion for evolutionary enlightenment, for awakening to the truth of who we are, and then daring to allow ourselves to experience the urgency to make it manifest in this world with all of our being.

Source: http://www.enlightennext.org/magazine/j21/gurupandit.asp

Who would I consider an enlightened leader?

Perhaps the Dali Lama. In the business world, I would say Fred Kofman, Axialent founder and President is an enlightened leader and maybe John Mackey of Whole Foods. But, I never worked for them and I believe that would be the tell tale sign.

Great question: who do you think are enlightened leaders?