Energy security is one of the cornerstones of the modern economy. However, Pakistan has struggled for decades to find a viable strategy for ensuring economically viable options to meet this essential requirement of the modern economic system. Pakistan's reliance on fossil fuel-based power generation has not only incurred huge economic costs but also made the country vulnerable to the instabilities of international market forces. However, the global economy is now moving through a phase of energy transition i.e. from fossil fuels to sustainable energy. This transition offers a golden opportunity for Pakistan to restructure its energy mix in a manner that can be cost-effective as well as resilient to economic and military threats, considering the country's strategic environment. This paper seeks to present an overview of the requirements for energy security in the modern age while proposing some of the viable options for sustainable energy and strategies for its implementation.