15. Deloitte Technology
2016 Rank: 16
Top Executive: Cathy Engelbert, CEO
Location: New York
Deloitte teamed up with Apple in a new partnership aimed at expanding the use of iPhones and iPads within the business world. As part of the partnership, Deloitte launched a new Apple practice consisting of more than 5,000 strategic advisers. Deloitte also acquired top Amazon Web Services partner Day 1 Solutions. Day 1 had in recent years branched beyond the state, local and education space into servicing federal government customers.