XL Inc. and Alon Inc., which merged last April, are now known as XLA.
"We are excited to come together today under a distinctive new name, XLA," said the company's chief executive officer, Lloyd Mustin. "The brand is a melding of two great company names and signifies the smooth transition to a new company culture in the six months since our merger.
"Our customers should continue to expect outstanding work from XLA as we move forward under our new banner," he said.
Along with a name, XLA features a new logo and website.
"Both companies have long been committed to delivering the highest quality service and work ethic, so it is fitting that XLA will be identified with the phrase Excellence Always," said Bill Weber, XLA president. "That is the ideal on which we are building our reputation, and we intend to live up to those words."
Alion and XL, for nearly 30 decades, has worked with more than two dozen federal agencies for procurement of goods and services and in program management.