Leo Strine Jr., who built a reputation as a preeminent corporate governance expert over two decades deciding business disputes in Delaware, is joining Wachtell, Lipton, Rosen & Katz, the firm said Monday.

Strine was just 55 when he retired from his position as chief justice of the Delaware Supreme Court last July, about midway through his 12-year term and after 21 years as a Delaware judge.

Before he was named to the state's highest court in 2014, Strine presided over one of the country's most influential business courts in his role as chancellor of the Delaware Court of Chancery. Throughout his tenure there he relished in the arcana of corporate governance, delivering sometimes biting opinions on the scope of board member obligations, merger defense and other key topics in the field.