Deltek is an American multinational enterprise software and information solutions corporation headquartered in Herndon, Virginia.

[8] Then, in 2005, the private equity firm New Mountain Capital bought 75% of Deltek’s shares.

[8] In 2006, the company had around 11,000 customers, including Bechtel Corp., Hellmuth, Obata & Kassabaum, and Verizon.

[3] In August, the company was bought by Thoma Bravo LLC for $1.1 billion and again went private.

[5][11] In July 2016, Deltek acquired the Nottingham, UK-based company Union Square Software.