At 110 stories, the Willis Tower (formerly known as the Sears Tower) is the tallest building in North America. As a major landmark and tourist attraction, the building draws 1.6 million people every year to see the view from the Skydeck. But there is another “side” to the tower: It serves as a workplace for 100 different corporate tenants ranging from United Airlines to law firms to the global insurance broker, Willis Group Holdings, which purchased the naming rights in 2009.
For these tenants, who use a different, highly secure entrance from the ones tourists use, the process of monitoring contractors, clients and other visitors to their suites can be a challenge.