Sullivan & Cromwell said it has handled client matters related to sanctions and anti-money laundering for years, but it formed a new national security practice this week to present “cohesive advice” to clients amid ramped-up government enforcement activity.

Anthony J. Lewis. Courtesy photo

The Wall Street law firm’s national security group will initially have five co-heads and about a dozen attorneys “actively involved,” said Anthony Lewis, Sullivan & Cromwell partner and co-head of the practice.