Greenhill & Co, which moved into the top 20 rankings for US M&A advice last week, has continued a fine run of August mandates with a role on a $1bn deal in the technology sector.

The boutique was lead adviser to Deltek , which provides software for professional services firms and government contractors, on its $1.1bn buyout by private equity firm Thoma Bravo. The cash deal has been approved by private equity group New Mountain Capital, which is Deltek's largest shareholder, according to a statement.