Two established business litigators from midsize Atlanta firms with deep roots in the city’s legal community have left for the local offices of large national firms.

Walter H. Bush Jr. has decamped from Arnall Golden Gregory, where he headed the business litigation team, for the local office of Schiff Hardin, a Chicago-based firm that started an Atlanta operation two years ago. Associates Tammy A. Bouchelle and Christopher B. Freeman, as well as legal assistant Arlene Lathrop, joined Bush, who said his charge will be to develop Schiff Hardin’s local litigation practice.