Amentum said today it has agreed to acquire DynCorp International, which would create a $6 billion contractor. Terms of the deal between the two privately owned companies were not disclosed. The combined company would have more than 34,000 employees in more than 30 countries. Amentum was created earlier this year when AECOM divested its management services unit, selling it to private-equity firms American Securities and Lindsay Goldberg. Amentum is a professional services company focused on design, planning, architecture, engineering, program...