Greater Pittsburgh Allegheny County Business Leaders Esmark, Inc., is a diversified, privately held portfolio of industrial companies. Esmark’s roots run deep in the steel industry, but over the years the company has diversified its interests into a number of activities in and around the industrial and commodity sectors. Esmark (formerly a publicly traded company on NASDAQ: ESMK) has focused on several key industries including steel services, oil and gas exploration, manufacturing, aviation services, real estate, technology, and youth sports and development. Today, Esmark’s two largest business segments are steel services and oil and gas exploration and production. The company grew its network...