The California Senate has retained a Gibson, Dunn & Crutcher team led by former federal prosecutor Benjamin Wagner to investigate sexual harassment complaints against senators, the state Senate president said Thursday.

Gibson Dunn will work with Sacramento-based Van Dermyden Maddux Law Corp. and that firm’s senior partner, Deborah Maddux, on the two-year contract. The firms will field complaints from a newly established telephone hotline and an online portal, investigate allegations and report their findings to the Senate Rules Committee.