Alion Science and Technology Corporation is an employee-owned technology solutions company delivering technical expertise and operational support to the Department of Defense, civilian government agencies and commercial customers.

Alion was formed in December 2002 when approximately 1600 employees of the IIT Research Institute (IITRI), founded in 1936, purchased substantially all of the assets of IITRI creating a 100% ESOP-owned company. Each Alion employee has a personal stake in ensuring the collective success of the company.