Employment and securities heavyweight James Finberg is leaving Lieff Cabraser Heimann & Bernstein in January for a much smaller San Francisco litigation firm.

On Jan. 1, he and employment partner Eve Cervantez will join Altshuler, Berzon, Nussbaum, Rubin & Demain. The 20-attorney firm specializes in public interest cases, representing environmental groups, public agencies and unions as well as individuals in employment discrimination and wage-hour suits.