Its not that much easy friend in the current market conditions.
Most of the clients will require the expertisation levels from RTL to GDS-II. All these requires huge amount of Technical Talents in multi-facete like Verilog/VHDL/SystemVerilog/Specman/Vera/C/Assebly, Resources like high-end machines and very high cost EDA tools for Front-end and Back-end as well as Right skilled people and proper managers in place.
In India some of the verification services companies are : Wipro, MindTree, Techforce, TCS, Mirafra, QThink, Sasken, HCL, etc..
-Paul