Ronnie Jung, executive director, was appointed interim CIO of the Teacher Retirement System of Texas, Austin, at a board meeting May 12. Former CIO James R. Hille left the fund May 1 to become CIO of Texas Christian University, Fort Worth. The $100 billion system also formally created a committee to choose an executive search firm to find a permanent CIO, said spokesman Howard Goldman. The search committee will meet before the next full board meeting, scheduled for June 8-9, to select a firm, Mr. Goldman said. System officials issued an RFP for a search firm on April 17, and responses were due May 1. At the May 12 board meeting, trustees also approved a resolution making the CIO eligible for up to 75% of his or her base salary as a performance incentive.