Ohio Bureau of Workers Compensation Fund, Columbus, hired Wilshire Associates as consultant to the $14.5 billion fund. said Emily Hicks, spokeswoman. Callan Associates had been consultant to the fund for four years, but fund officials in July opted not to renew the contract. Ennis Knupp was the fund's consultant in the interim. R.V. Kuhns and Mercer Investment Consulting were the other finalists. An RFP was issued four months ago.