Squire Patton Boggs has merged with US firm Carroll Burdick & McDonough, in a deal that sees the former boost its lawyer headcount by over 50.

Litigation and risk management firm Carroll Burdick was founded in San Francisco and also has bases in Los Angeles, Beijing, Hong Kong and Böblingen.

The deal therefore sees Squire Patton Boggs expand its already existing offices in four of the five locations, with the firm gaining Böblingen as an additional base in Germany.

There are currently over 30 partners and 50 lawyers listed as working at Carroll Burdick globally, giving the firms a combined lawyer headcount of approximately 1,550.

It is nearly two years since partners at Squire Sanders agreed to merge with US-based Patton Boggs.

Since then, the firm has posted a 12.3 per cent hike in revenue its first year-end results as a merged firm and taken on a three-partner Tokyo firm Mamiya Law Offices.

It also ended its strategic alliance with Jakarta-based Melli Darsa & Co, just two years into the relationship.