From the Wikipedia page [1]
Sir Nigel Knowles is the former global co-chairman of the law firm DLA Piper.
He was educated at the University of Sheffield, where he studied law, and joined Broomhead & Neals as an articled clerk in 1978.
In 1996 he was appointed as managing partner of what was then Dibb Lupton Broomhead. In 2005 he became joint chief executive officer of DLA Piper following a three-way merger between DLA and U.S. law firms Piper Rudnick and Gray Cary Ware & Freidenrich LLP. He was knighted in March 2009.
In 2016 he was picked to serve as High Sheriff of Greater London for one year.