Engineering sector plays a considerable role in Pakistan’s economy. The contributionof engineering industry to GDP is $2 billion and it provides employment tosignificant personnel. The engineering sector in a number of economies of the world,works as a major and speedy engine of economic growth. This study is an attempt toidentify the factors affecting the earnings of engineering sector of Pakistan, by usingthe panel data of twenty-seven engineering firms listed on Karachi Stock Exchange(KSE) covering the period of 1990 to 2008. It is found that, in the long run NetWorking Capital, and GDP growth has a positive impact on Earnings per Share andOperating Ratio, Net Fixed Assets and GDP deflator has a negative impact whileInterest rate has not significant effect on earnings per share.