Washington, D.C.-based class action firm Cohen Milstein Sellers & Toll has opened anew in Philadelphia and created a whistleblower practice through the hire of three Berger & Montague attorneys.

This is the second time Cohen Milstein has opened an office in Philadelphia. Its previous location in the city, which closed down about six months ago, was opened around 2005 to accommodate a partner whose wife got a job in the city and needed to move. That partner went back into government work and Cohen Milstein shut its doors in Philadelphia.