After his service in the Clinton administration, Johnson returned to Paul, Weiss in 2001, where he was an active trial lawyer of large commercial cases. Johnson was a member of the Executive Committee of the New York City Bar Association.fter his service in the Clinton administration, Johnson returned to Paul, Weiss in 2001, where he was an active trial lawyer of large commercial cases. Johnson was a member of the Executive Committee of the New York City Bar Association.