After a 15-year career as a medical-malpractice defense litigator at Alston & Bird, Lori G. Cohen has moved to Greenberg Traurig, taking a team of 11 with her.

She’s making the switch, she said, because Greenberg, which has 24 offices nationwide, will give her a broader platform for a practice that’s become increasingly national. She also will have the chance to help develop the firm’s Atlanta litigation team.